Ancient coral cliffs and dodgy landings; swimming in caves and spotting birds that live in the dark…. South Pacific Adventure, part 7

(For new readers: if you’re just discovering this blog and you would like to read about my South Pacific travels from the beginning, you can click on this link to go to the first chapter:  Travels in the Cook Islands.)

Trees and ferns growing out of the makatea (ancient coral) in the interior of Atiu, Cook Islands

I left Aitutaki on a Friday morning, driven to the airport by Tracey. En route we passed the motorcade procession of Miss Cook Islands, who had just arrived on an early plane and was standing up in the lead vehicle, waving and smiling to all and sundry. Her retinue comprised men on scooters and in cars and trucks, including what looked like most of the musicians from Island Night, playing and singing enthusiastically as they bowled along. Most of the locals had come out to greet her, standing outside their homes and Puffy’s Bar to wave at Miss Cook Islands as she cruised past. It seemed like a fittingly fun ending to my stay on this lovely island!

Arriving tourists at Aitutaki airport were being greeted with tiare leis (flower necklaces) as I walked to the tiny prop airplane that would carry me to Atiu. The pilot cheerfully greeted me on the tarmac, then hopped aboard as I and fellow tourists Donna and Mark from New Zealand took our seats. (Donna and Mark had also been staying on Aitutaki, having got married there the previous week.)

Once in the air I took a last look back at Aitutaki’s beautiful lagoon with its milky-white sandbars, before our plane headed southeastwards over the wide ultramarine blue of the Pacific. En route to our destination we flew over the island of Manuae: a small oval of green fringed with yellow beach and turquoise lagoon and surf-ringed reef; shallow sea falling away into the deep blue fathoms of the South Pacific ocean. It impressed me again how isolated these little islands are, in their thousands-of-miles-wide lapis lazuli sea: how remarkable it is that the people who populated them navigated this vast expanse of ocean.

Atiu airport, the Cook Islands

Landing on Atiu’s small air strip was an interesting experience, as the island rears out of the ocean on fossil coral (makatea) cliffs several metres high. This produces violent updrafts and sidewinds which meant our plucky pilot had to bring us down pretty steeply and rapidly, the plane rolling and yawing as the wind buffeted it. But once our wheels thumped down onto the tiny crushed coral landing strip we all released the breath we’d been holding, and disembarked into the charming corrugated iron-roofed shed that is Atiu airport.

All three of us visitors were staying at Atiu Homestay, a bed and breakfast run by Marshall Humphreys and his wife Jéanne. Marshall met us at the airport and drove us to his home via some local places of interest. First stop was Taunganui Harbour, constructed out of concrete in the mid-1970s by New Zealand Army Engineers to enable ships to load and unload goods safely. Before it was constructed, accessing the island by boat or ship was a lot more perilous, especially in poor weather. The harbour had benefited local fishermen, many of whose boats we saw pulled high up in the scrub inland behind the harbour (to protect them from the same tsunami warning I’d received while on Aitutaki).

Taunganui Harbour, Atiu, the Cook Islands
Outrigger canoes near Taunganui Harbour on Atiu, the Cook Islands

Our journey took us along a mostly single-track road through Teenui and Areora villages. In the settlements the roads were tarmac, but elsewhere we trundled along on crushed coral or packed dirt. I saw single storey houses built from breeze blocks and timber, corrugated iron roofs and louvred glass windows, painted in rainbows of colours.

House on Atiu, the Cook Islands

When we reached Marshall and J­éanne’s house, it was raised up off the ground on stilts: a sensible precaution to allow cyclone winds to blow through. Set in a pretty garden in a quiet corner of the island, it was a lovely (and very comfortable) place to be staying. I was looking forward to a few days of comparative luxury, having my meals cooked for me!

Donna and Mark then displayed the typical generosity and friendliness I’d encountered in all the Kiwi tourists I’d met so far: on hearing that my digital camera had died on Aitutaki, they offered to lend me one of theirs for the duration of our stay on Atiu… Which is why I have actual photographs of this wonderful little island! Huge gratitude to both of them.

Atiu Homestay, on Atiu in the Cook Islands

After dumping my backpack in my room, Marshall refreshed and refueled us with some chilled water and a snack of sundried banana, which he makes using a solar drier in his back garden. (The drier’s feet stand in tubs of water, to prevent ants and other minibeasties getting at the drying banana strips). I’d not previously been much of a fan of dried banana, finding it somewhat like chewing sweetened shoes, but Marshall’s was a treat: soft and succulent, and brimming with rich fruity flavour.

Solar banana drier at Atiu Homestay, Atiu in the Cook Islands

Atiu is a very small island (3.7 x 4.3 miles, or 6km x 7km): the current population is roughly 450 people, so it feels like a pretty quiet place. People live in the island’s interior here: a demographic shift that happened with the arrival of Christian missionaries in the mid-nineteenth century, who encouraged the population to relocate centrally, away from the makatea and swampy areas they were formerly living in. J­éanne and Marshall live in this central area of the island, not far from the village of Areora (you can see the red dot marking their house on the map of Atiu, pictured below).

Map of the island of Atiu, the Cook Islands

Once we were watered and banana’d up, Marshall took us on an expedition to Anataktaki, the cave of the kōpeka or Atiu swiftlet, Aerodramus sawtelli. J­éanne is half Cook Islands Maori, and Anatakitaki is located within her family land: its name comes from the story of Tangaroa and Inutoto, which I set out here as Marshall related it to us.

Tangaroa was a skilful warrior, while Inutoto was a wonderful dancer. One full moon night – a good time for fishing, and for dancing – Tangaroa wanted to go fishing, but was worried that if Inutoto went dancing without him she would be too popular… So he asked her to wait at home until he returned. A group of Inutoto’s friends passed by her home and asked her to come dancing, but she told them she had to stay; then later a second group of friends came by, begging, Hey, we’ve waited a whole month to see your new dance, you have to come and dance with us! So eventually Inutoto was persuaded, and went dancing under the full moon.

Out on the reef the fish stopped biting: Tangaroa tried every trick his father and grandfather had taught him – different bait, different fishing spots on the reef – but to no avail. He gave up and returned home… to find Inutoto not there. Heading to the dancing area he found her dancing, the centre of attention and admiration. Becoming angry, Tangaroa spoke harshly to Inutoto: then each of them left the dancing ground, separately.

Though Tangaroa waited at home, Inutoto did not return. He assumed that she went to stay with cousins or other family or friends… But over the next day and night there was still no sign of her. No-one had seen Inutoto since they quarrelled on the night of the full moon dance. A search was carried out of the bush and makatea and swampland; a week went by, three weeks, and still no trace of Inutoto. People began to say that she must have had an accident and died somewhere on the island… But one day Tangaroa was working in his planting field when an ngōtare, a chattering kingfisher (Todiramphus tuta, pictured below in J­éanne and Marshall’s garden) began pestering him, diving down at him and pecking at his head, again and again. Rangaroa couldn’t drive it off: it seemed as though the bird was trying to tell him something.

Ngōtare, a chattering kingfisher (Todiramphus tuta), on Atiu in the Cook Islands

When Tangaroa turned to the ngōtare it flew off a little way then back to him, as if trying to lead him in a particular direction. He followed the bird through the makatea and eventually he came to a cave where he found Inutoto, still alive. (‘Inutoto’ means ‘drinker of blood’ – according to the legend she survived by drinking her own blood!) So this story of jealousy and a lovers’ quarrel has a happy ending… And the helpful ngōtare who reunited Tangaroa and Inutoto gave the cave its name, Anatakitaki: ‘to the cave he brought him, he brought him’.

Marshall Humphreys with the walking sticks needed for traversing the difficult path through the makatea to Anatakitaki Cave, Atiu

And indeed, ‘to the cave he took us, he took us’! But at the very start of our walk Marshall advised us all to take a sturdy walking stick, to keep us steadier on the journey. Our path lay across a stretch of makatea: the ancient fossilised coral that was formed around the island’s central raised volcanic core thousands of years ago when the island was lower than it is now; and raised up by tectonic plate action in the intervening centuries. (Hence the six metre-high makatea cliffs around the island’s periphery.) Makatea limestone is as jagged and sharp as the corals that it formed from, so falling onto it would be a painful experience.

Following the path over the makatea to Anatakitaki Cave, on Atiu

The photo above shows a pretty typical stretch of the craggy makatea path we followed: like walking across a stony surf, with ferns and scrub growing out of every nook and cranny. The walking sticks were definitely necessary!

Asian spiny-backed spider (Gasteracantha mammosa), on Atiu in the Cook Islands

We’d only been walking a few minutes when I spotted a brightly-coloured spider on the path, which I pointed out to Marshall. He pronounced it a non-native invader – and he was right, because it was a female Asian spiny-backed spider (Gasteracantha mammosa), originally from India and Sri Lanka and introduced recently to the South Pacific. Further research once I was back in the UK yielded this entry on the Cook Islands biodiversity database: “Poisonous bite. Its spiky webs can be a residential nuisance; and it frequently bites people it comes into contact with. The bite is painful with localised swelling.” Marshall proceeded to squash the spider with the tip of his walking stick, which may sound harsh… But invasive non-native wildlife species are a serious threat to the biodiversity of these little island ecosystems, and Atiu takes protecting its native wildlife very seriously.

Polynesian mahogany tree (Calophyllum inophyllum) growing in makatea forest on Atiu, in the Cook Islands

A little further on our journey we came upon a wonderful big old Polynesian mahogany tree or mastwood (Calophyllum inophyllum), locally named tamanu. Timber from tamanu trees was highly valued for shipbuilding by Polynesian and Maori peoples, much like oaks were valued in English culture for the same reasons. Sacred tamanu groves were planted at marae sites, considered the homes of spirits; and the wood was also used for carving tiki. Tamanu oil extracted from the ‘nuts’ of the tree is also important in Cook Islands Maori and Polynesian cultures, being used for medicinal and cosmetic purposes. Marshall explained that there were many of these huge tamanu trees hidden away in the makatea, because the inaccessibility of these areas keeps the trees safe from felling and logging.

Scrub forest on the makatea, Atiu (the Cook Islands)

Another thing I noticed along our route were the numerous empty coconut shells lying on the forest floor, with ragged frayed holes through the shell. Rather than being signs left by some giant tropical squirrel, Marshall explained that these were the remains of coconuts opened and eaten by the coconut crab or unga kaveu (Birgus latro). I’d encountered these largest of land crabs moving about nocturnally and climbing trees on Aitutaki: they can seem like fearsome critters at first sight.

Juvenile coconut crab (Birgus latro), photographed on Aitutaki (the Cook Islands).

These land-based crabs go to the sea to spawn, but after a while the young crabs migrate back to dry land, wearing borrowed seashells to protect their vulnerable soft hind parts. As they mature they develop hard shells and discard their armour, foraging for food using their acute sense of smell. Despite their name these kaveu eat a variety of foods including fruits, nuts, seeds and even carrion: they have the reputation of carrying off any food they find lying around, giving rise to their scientific alias – latro means ‘robber’. Astonishingly they typically live for 40 – 60 years… So although kaveu are highly-prized as food, their longevity makes them a vulnerable species for over-exploitation.

About to descend into the entrance to Anatakitaki Cave, Atiu (the Cook Islands)

When we finally reached Anatakitaki the way in was to descend down a ladder below ground ground level. I’d done some potholing with friends in Derbyshire in my youth, so I was reasonably relaxed about the prospect of going into enclosed dark underground spaces. Anatakitaki is a karst cave: the calcium-rich makatea is dissolved by water, eroding into an undergound landscape of caves and fissures and chasms; minerals in solution then solidify again into diverse speleothems (stalactities, stalactites, limestone ‘curtains’ and pillars).

Journeying through the tunnels and caverns of Ana takitaki Cave, Atiu (the Cook Islands).

In practice, this means that travelling through Anatakitaki’s upper levels is not particularly claustrophobic, as there are many fissures and large holes which let in daylight. Having Marshall as our experienced guide obviously helped: he was able to share with us stories such as the tale of Inutoto and Tangaroa, as well as showing us J­éanne’s family monument within the cave. Each time a family member visits the monument (e.g. for special occasions) they can place a stone upon the pile. Somewhere buried underneath will be a carved seat, a carved bowl, and spears.

Caves of any sort are an unearthly landscape, but there was something particularly fantastical about this one. The caves I’d visited in the UK had been crawled all over by thousands of potholers, and in many cases their delicate limestone draperies and features had been eroded and broken… But here in Anatakitaki Cave, everything looked almost untouched by human hands.

The feeling of being in a lost mythical world was enhanced by the places where the cave has collapsed, creating openings looking out into the surrounding forest. It felt as if a dinosaur or a dragon could hove into view at any moment, lumbering through the coconut palms and ferns.

View out into the forest from Anatakitaki Cave, Atiu (the Cook Islands).

In places the makatea is thin enough that the roots of ava, Pacific banyan trees (Ficus prolixa) have grown through in striking curtains, following the rainwater that drips and filters down into the caves below.

Banyan tree roots (Ficus benjamina) growing through limestone into Anatakitaki Cave, Atiu (the Cook Islands).

Just beyond the banyan roots we descended into the deeper recesses of the inner cave where the object of our quest here lay: the nesting sites of the Atiu swiftlet, or kōpeka. We paused in the entrance of this inner chamber to watch and listen to the kōpeka swooping in and out. Whilst flying and feeding outside in the daylight they make a high twittering chreeee call: but as soon as they head into the cave’s darkness this changes to a rapid clicking sound, like someone swiftly clicking their tongue against the roof of their mouth. The birds are echolocating: navigating in darkness using these audible clicks, which increase in frequency as they approach objects. A wonderful example of parallel evolution: birds echolocating like bats!

Anatakitaki Cave interior, where the kopeka (swiftlets) nest (Atiu, the Cook Islands).

Once inside the deeper recesses of the cave it quickly grew almost pitch dark, except for the headtorches that Marshall used to show us the space. We kept still, listening to the clicking of these weird little birds, as we tried to spot them roosting and nesting in the nooks and crevices in the limestone – no easy task. You’re basically trying to spot a small black bird in a large black cave, with the light of your head torch creating shadows everywhere it falls on the convoluted stone.

Eventually we began to pick out the slender forked-tail silhouettes of the kōpeka, clinging to their niches on the cave ceiling. Male and female birds build their nests out of strips of vine and plants and lichens gathered on the wing outside, fragile little circlets stuck together with their saliva. They lay 1 – 2 eggs which hatch after 18 – 20 days; sometimes eggs fall out of the fragile nests to smash on the cave floor. Both parents take it in turns to brood; and when the nestlings hatch the adults share the task of feeding their chicks on insects hunted outside in the forest. These insect food hauls are stored in special pouches within the bird’s cheeks, so that they can still make echolocating clicks with their mouth full!

Once kōpeka chicks are old enough to leave the nest the parents bring them to hang out on a section of cave wall or ceiling with other youngsters, still feeding them. After another week they encourage the young by withholding food until the chicks move a little further out of the recesses of the cave. This process continues until after three weeks the juvenile birds make their first flight out of the cave to find their own food… And then navigate back inside using their clicking echolocation for the first time.

Sitting in the darkness listening to the clicking of these dark-living little swiftlets felt enchanting. I’d been drawn to visit Atiu by its reputation of unspoiled wildness and rich biodiversity: very different from the tourist paradise of Aitutaki, or even the teeming undersea life of the coral reefs. Atiu felt ancient and alive: a beating heart of stone and water and green plants and living creatures, a precious little gem.

Before we left Anatakitaki Marshall had one last surprise for us: an underground swim. We clambered down a narrow passage to an artesian pool, which Marshall illuminated by lighting a couple of candles in the inky blackness. I was the only one who took the plunge, and it was gorgeous: pleasantly cool but not too cool, refreshing in the humid tropic air. As I swam gently in the blue water by candlelight, dozens of metres underground, thousands of years of fossilised coral reef above my head, I found myself laughing with sheer joy. The gift of this eerie, beautiful place, with its family history and its water-carved limestone sculptures. The shadowy flitting spirits of the kōpeka, their clicking percussion echoing from the stone. This wonderful, magical moment.

Swimming in Anatakitaki cave, Atiu (the Cook Islands).

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Coming up next time, in South Pacific Adventure part 8:

Gods and government, proud warriors and foreign invaders: discovering the landscapes and history of Atiu.

Up a stolen mountain, and under the ocean… South Pacific Adventure, part 5

Matriki’s motto, ‘Just casual’, applies to everyone who stays here… Even Matriki’s cats! Marmalade (pictured above) especially liked a regular snooze on the porch of my beach hut, giving an excellent example of how to kick back and chill out tropical-style.

Eleven days into my South Pacific travels and with three weeks to go, time felt like it was passing far too quickly. I was beginning to settle into Aitutaki’s laid-back atmosphere: wandering along the beach or swimming in the turquoise sea to cool off in the midday heat; enjoying the marine life of the coral reef; talking with other tourists and local folks about Aitutaki culture, wildlife and history.

I was learning a lot about the ways in which Cook Islanders use natural resources, such as plants. At dusk if I walked along the beach, the sand along the treeline was scattered with the fallen blooms of beach hibiscus (Hibiscus tiliaceus), called ‘Au or String Tree in local parlance. Strips of this tree’s inner bark are soaked in the lagoon for three weeks before being dried for twenty-four hours in the sun: these prepared fibre strips (called kiri’au) are then bleached or dyed and made into the so-called ‘grass skirts’ and leggings used as dance costumes for performances on Island Nights.

The sustainable use of local resources is important on an island where even things such as soil and fresh water are in limited supply and many consumables are imported. Talking over lunch at Tauono’s (a local organic gardening project with a cafe) with a Kiwi traveller called Tim, I learned that the huge container ship that visits Aitutaki regularly to bring in supplies cannot enter the harbour at Arutanga – the ship being simply too big to pass through the channel in the reef. Instead a cargo barge chugs out to the ship and brings in containers of goods, at a cost of $3,500 per trip! Small wonder then that even simple groceries like bread, cheese and tinned goods are expensive to buy on Aitutaki.

Expensive or not, I needed some basic supplies: so I set out on the two-mile walk along Aitutaki’s main road from Matriki to the downtown metropolis of Arutanga. I’d only been walking ten minutes when with typical Cook Islands generosity a friendly local offered me a ride there in his pick-up. I pottered about in Arutanga shopping for essentials (bread, cheese, fresh veg, beer) before strolling back home to Matriki. As there was virtually no traffic and I’m insatiably nosy curious about my surroundings, I enjoyed my walk, taking in the sights… Including a big mama pig and her brood of tiny wee piglets snuffling about at the side of the road.

Pigs are an important domestic animal in the Cook Islands: along with chickens you see them almost everywhere, usually roaming semi-free range. Typically they’re big and furry and more like wild boar than the blobby farm-pigs we’re more familiar with in the UK. Think Were-pig and you’re in the right area. I felt inclined to treat them with respect and give them plenty of space, especially big mamas like this one. (Her spotty little piglets were über cute, though!)

While I was in an exploring mood, I decided to go for a walk northwards and inland, to climb up Aitutaki’s highest point: the hill called Maunga Pu . At 124 metres high it wasn’t exactly Alpine, but I felt like stretching my legs and getting a bit of an overview of the landscape. Maungu Pu means “top of the mountain”: Cook Islands legend tells of how the hill was actually the summit of a high mountain called Maru on Rarotonga, which Aitutaki warriors stole and brought back to their own island!

The route to the top of Maunga Pu was easy to find and follow, starting out as a decent road that led through groves of pawpaw trees (Asimina triloba, or vīnītā). I’d already eaten plenty of pawpaw fruits since arriving in the Cook Islands: they’re creamy and sweetly-scented when ripe (similar to a mango), and work well in salads and desserts… But eating too many can have a laxative effect!

As I walked higher up the track became rougher and the views greener. As soon as you get into Aitutaki’s interior you realise how undeveloped it is. The coastal fringes are dotted with resorts and tourist accommodation, but inland is pretty much left to the locals. There’s some farming and a few access roads; two or three water tanks and some hamlets and scattered houses; and the island’s other high viewpoint, Piraki lookout.

Trevor and Tracey (Matriki’s resident caretakers and hosts) had told me that there had been a bush fire up on Maunga Pu not so long ago, so I wasn’t surprised to see signs of burned palm trees and blackened ground as I climbed higher up the path. Vegetation dried by fierce tropical sun mean that a fire can get hold quickly, and strong winds on this exposed island can sweep flames over a large area.

Luckily a lot of local plant species are evolved to survive in tough conditions, so most things appeared to be growing back.

Reaching the (slightly singed) heights meant that I was able to get stunning views over the whole of Aitutaki. Looking eastwards towards O’otu, the contrast between the shallow turquoise waters of the island’s coral lagoon and the Prussian blue of the deep Pacific Ocean beyond was striking

Looking south I could see Vaipae wharf on the island’s east coast, and in the distance the motu of Aitutaki’s lagoon where I’d travelled by boat with Puna only a couple of days earlier. Standing atop Maunga Pu you really get a sense of how small Aitutaki is… and how breathtakingly beautiful. These small islands in the South Pacific are absolute gems, and it’s small wonder that tourists come here for a taste of paradise.

Being tiny and relatively low-lying, however – and with the majority of their population living on or near the shoreline – the Cook Islands are incredibly vulnerable to climate change. The coral reefs are being bleached by increased UV radiation and all marine life is adversely affected by water pollution and ocean acidification. Tropical cyclones are becoming more violent, which when coupled with rising sea levels could produce potentially catastrophic flooding and loss of life.

Small wonder then that local communities are getting organised to take action and campaign for policy changes to halt climate change. Grassroots networks like 350 Pacific are working with communities across 15 Pacific Island nations to highlight the vulnerabilities of these countries, while using their strength and resilience – along with local networks and partner organisations – to challenge politicians and corporate interests. Kia manuia!

Looking westwards I could see out over the coral lagoon, narrower on this side of Aitutaki. When swimming offshore at Matriki and Vaikoa I was very focused on the marine life in the shallow waters, and didn’t tend to venture near the reef’s seaward edge. There can be tricky currents there and locals warn tourists against getting too close: but looking down on Amuri’s coast I got a tantalising view of the wide blue South Pacific beyond the reef.

On Maunga Pu’s summit there is a nice folksy piece of local history, in the form of an inscribed concrete marker celebrating a Boys’ Brigade Battalion camp up there in the early 1970s. I suspect that camping up on top of the hill must have been on the breezy side.

After sitting for a while on the summit to enjoy the gorgeous views and fresh breeze, I descended along the track and headed homewards to Matriki. Along the way a few plants caught my eye, including the Tahitian Gardenia (Gardenia taitensis, or tiare Māori). This ubiquitous and lovely flower is synonymous with the South Pacific, being used as a garden shrub and for scenting soap and coconut oil… yet it’s non-native to the Cook Islands. Ironically, it’s not native to Tahiti either – the plant was introduced there too, from its native range of Vanuatu, Tonga and Samoa.

I also spotted another showy non-native that I saw in several places on my travels: the bright orange flowers of the African Tulip Tree (Spathodea campanulata). The local name for it is kō‘ī‘ī, which means “to squirt” – apparently the buds can be used to squirt water!

The tropical climate of Aitutaki means that plants flourish, which can be problematic if the plants in question are non-native invasive species like the tulip tree. Tackling these troublesome invaders is another environmental headache for local communities, with little funding available for remedial measures such as biological control.

On the plus side though, nature can swiftly cover up what man has discarded: I found a rotting jeep that was being slowly carpeted with moss and ferns. Give it a few years, and it’ll probably be rusting down and buried under a flourishing green tide.

After a day of exploring on foot, the siren call of the warm tropical sea drew me back to my ideal beach bum life: snorkelling, sunbathing and strolling. The southwesterly winds which had blown in at the end of my lagoon tour with Puna a few days ago had raised a swell, stirring up the lagoon’s sandy bottom and making poor visibility for taking photographs. But the following day after my walk up Maunga Pu the weather had calmed, so I donned mask and snorkel and rash vest (to protect my healing sunburned back) and went to hang out with my fishy friends.

As soon as I waded into the shallows I was surrounded by teeming schools of tiddlers darting between the coral and around my legs, like green pullers Chromis viridis (local name katoti), pictured above.

In amongst the green pullers were their katoti cousins humbug damselfish (Dascyllus aruanus), stroppy little black-and-white striped fish who often came close enough to nibble investigatively at my skin.

I saw an incredible variety of colourful butterflyfish (called taputapu by locals) on my snorkeling explorations around the reef. There were many different species, such as this redfin butterflyfish (Chaetodon lunulatus), pictured above…

…Bennett’s butterflyfish, Chaetodon bennetti

…Racoon butterflyfish, Chaetodon lunula

…And threadfin butterflyfish (Chaetodon auriga). The somewhat homely creature lying on the sandy bottom in this photo is a sea cucumber (Holothuroidea).

Known locally as rori – and as bêche-de-mer in French Polynesia – these cousins of the sea urchin can be found lying all over the sea bottom. Some tourists gripe about their presence, but without the sea cucumbers Aitutaki’s sands would not be as clean as they are: the rori feed by slowly ingesting the sediments of the sea bottom, sifting through it for organic matter. They are basically biological hoovers – and are also exported as food to Asian markets.

Snorkelling around coral bommies in the shallow water was like being on an underwater treasure hunt. Every new nook yielded some different marine creature to be amazed by, like this cute little yellow boxfish (Ostracion cubicus, or moamoa po’aki).

As the little boxfish disappeared the next stylish reef inhabitants that swam into view were a pair of smartly polka-dotted honeycomb toby or spotted pufferfish (Canthigaster janthinoptera, or ‘ue ‘ue).

What’s amazing about this undersea world is that so many species forsake camouflage as a survival strategy and blazon forth in every hue of the rainbow. This lemon peel angelfish (Centropyge flavissima or katoti) sported such lurid blue eye-shadow that I named it ‘Barbara Cartland fish’.

Swimming around another block of coral, I found a floral Maori wrasse (Cheilinus clorourus or kōpiropiro), displaying the amazing cryptic colouration that helps it to blend into the mosaic of bright coral and shadowy crevasses of its undersea environment.

An even more striking camouflage outfit is sported by the honeycomb grouper (Epinephulus merra or taraoa), which I spotted lurking on the sea floor under the edge of a large coral bommie. The pattern of hexagonal spots on this handsome fish make it look like a creature designed by CGI. I love finding mathematical patterns in nature, for me it’s a constant reminder that science and ecology and art are all interlinked.

Much smaller but even more eye-catching were the little blue devil damselfish (Chrysiptera cyanea), which like the green pullers were everywhere in the shallows, darting in and out of the cover of seaweed or coral outcrops. These electric blue tiddlers were smaller than my thumb, but what they lack in size they make up for in attitude: they’re fiercely territorial and often darted out to chase me away if I got too close to their home turf.

The reef is obviously a challenging place to live, with plenty of predators (not to mention human hunters). Fight, flight or hide are the strategies its inhabitants can select, but luckily I didn’t encounter anything which chose the first option. Most fish kept a watchful eye on me and when I came too close for comfort either zipped away into the blue or disappeared into nooks and crannies in the coral (like these clearfin and bloodspot squirrelfish, Neoniphon argenteus and N. sammara, or kūkū).

Of course, fight, flight or hide isn’t an option for all the reef’s creatures. Hard corals such as this lesser brain coral (Leptoria phrygia) are free-swimming in their larval stage, but once they settle on the seabed and develop into a polyp and eventually a colony, their destiny is fixed: at the mercy of sea currents, waves and storms, pollution, temperatures and pH. The calcium carbonate walls which each coral polyp fortifies itself within – and which form the beautiful and fragile sculptures that make up coral reefs – will dissolve if the pH of the ocean around them falls too low and grows acid.

A study published in Science magazine in 2018 predicts that ocean acidification (largely caused by increased amounts of carbon dioxide dissolving into our oceans, as a result of climate change) will reach a point by 2080 when coral reefs are dissolving faster than they can rebuild themselves. This is on top of warmer ocean temperatures causing coral bleaching, when corals expel the algae living symbiotically in their tissues. Bleached corals lose their brilliant colours and are functionally ‘sick’: not only does a bleached reef look a sad sight, but the coral will probably be unable to reproduce and will eventually die if sea temperatures do not reduce back to tolerable levels.

Wildlife like this pink Acropora digitifera coral and plants such as spiny-leaf seaweed (Turbinaria ornata or rimu taratara) not only create gorgeous places to snorkel round and explore, they are vital wildlife ecosystems in our planetary environment. They provide ecosystem services to humans too: sources of food for local people, and protective physical barriers around low-lying islands against cyclones and flooding. Some of the scuba divers whom I met while staying on Aitutaki spoke of how the coral reef around the island looked to them to be suffering from bleaching, as well as from physical damage caused by tourists and boat anchors. It made me feel doubly privileged – and careful of my impact – while snorkeling around these underwater treasure-troves.

The vivid blue starfish (Linckia laevigata or ‘etū-tai) creeping slowly over the brain coral was doing it no harm; its larger cousin the crown-of-thorns starfish (Acanthaster planci or taramea) is a different matter. I found these spiky behemoths several times when I was out snorkelling: they feed on the coral polyps, digesting their living tissues and leaving the white calcium skeleton structure behind. A single crown-of-thorns can consume up to six square metres (sixty-five square feet) of living coral in a year.

They are native predators and as such can actually promote structural and species diversity in coral reefs; but if they’re present in great numbers (a so-called ‘crown-of-thorns plague’) they can cause widespread destruction to a coral reef habitat. For that reason, many divers and fishermen dislike them and will kill them on sight. One recommended method I was told about is to chop the starfish up with a big knife or machete. As these beasties are well-armed with poisonous spines which will break off in your flesh, I didn’t feel remotely tempted to try it. The asterosaponin toxins which the spines contain cause stinging, swelling, bleeding and nausea: definitely a marine creature to be given a respectful distance.

One fish which I was ridiculously excited to find (and when I get ridiculously excited when snorkeling I make noises like a baby whale with ADHD) was the fabulous Moorish idol (Zanclus cornutus or rere’au). This beauty was gliding around the coral like a piece of fine ceramic art, but put on an impressive turn of speed when I tried to get closer for a photo. I’m not someone who gets excited by celebrities, but remembering this fish as Gill in Finding Nemo, I stalked it for ten minutes until it finally got tired of my adoration and huffed off with a flick of its elegant long dorsal fin.

I could probably have spent most of my stay on Aitutaki in the sea, captivated by the ever-changing artistry of the marine world. As mentioned earlier in this blog, when I was a kid I was enamoured by the TV cartoon Marine Boy, the first ever Japanese colour anime to be shown on UK television. Basically I wanted to be Marine Boy: I coveted his red wetsuit, his oxy-gum (which when chewed enabled him to breathe underwater), his dolphin sidekick and his mermaid friend (whose modesty was always miraculously concealed by strategically-draped hair). My obsession with this cartoon knew no bounds: I was once hauled out of the bottom of a swimming pool by a lifeguard, whilst sitting underwater attempting to breathe as if I had oxy-gum.

I never magically gained the ability to breathe like a fish, but the clunky yet charming animated undersea world of Marine Boy permeated my psyche and remains there to this day. When I’m swimming in the sea (or traveling across it on a boat) I am probably the happiest I ever get.

I stayed snorkeling in the lagoon till evening sank the sun into the sea. When I walked out onto the still-warm sand of Matriki’s beach, the ocean had become a great calm mirror, holding onto the sky’s fading light. For another day’s stay on this beautiful South Pacific island, I gave thanks. Meitaki atupaka.

Coming up next time, in South Pacific Adventure part 6:

Camera disaster; swimming with humpback whales; learning about Aitutaki’s history; and how we survived a tsunami warning.

…And if you’d like to read about my South Pacific travels from the beginning, go to the first chapter:  Travels in the Cook Islands.


Ychydig o law…

 

 

 

 

 

 

 

 

The talented multilinguists among you will of course have spotted that the title of this blog entry is in Welsh, and a very useful phrase it’s proving to be at the moment too. Translation? “A spot of rain.”

As a field teacher constantly working outdoors, I often use the phrase “There’s no such thing as bad weather, only unsuitable clothing” as a way of getting students to dress less for fashion purposes and more for the vagaries of British seasons. However, even I have found myself musing in the past week that perhaps it would be nice if it rained more at night rather than the frequent torrential daily downpours we’ve been getting. I know that we desperately need water, but as I cycled to the train station in yet another ‘heavy shower’ I found myself yelling “Stop raining!” As I write this, rain is battering my windows yet again, and the forecast for early May is ‘largely unsettled’. Thank you, Met Office. I think I will go and buy a new pair of waterproof trousers.

 

 

 

 

 

 

 

 

Luckily, when I went to stay with a friend in south Wales in early April we had at least one day of perfect sunny weather. We took advantage of this to go walking around Dinas Head on the Pembrokeshire coast. This part of Wales is a National Park and popular with walkers, with a lot of steep ups and downs along cliff edges (vertigo sufferers beware). The glorious views across the bay to Fishguard and out across the Irish Sea are worth a little exertion… And a stiff onshore wind kept us from overheating on the uphill stretches.

 

 

 

 

 

 

 

 

I love the sea in any kind of weather, so this was pretty nearly a perfect day for me: a long walk outdoors, fabulous views, sunshine and a picnic on the beach at the coastal village of Cwm-Y-Eglwys at the halfway point. There was plenty of wildlife to get distracted by along the way as well: gorse and violets, wheeling gulls overhead and even a rocky outcrop garnished with what looked to be Guillemots (Uria aalge). As I was carrying my camera I hadn’t brought binoculars along as well, although a helpful lady (who turned out to be an RSPB member) assisted with identification. If you are good at birds and can make them out in the picture below, let me know if she got it right.

 

 

 

 

 

 

 

 

On the way home to my friend’s house in the wilds of Dyfed we stopped off for a visit to Pentre Ifan, a Neolithic stone tomb dating from 3,500 BC or thereabouts. The earth mound that would once have covered the 16-tonne capstone and uprights has gone, leaving the stones standing dramatically against the Pembrokeshire skyline. As it was late in the day we had the site to ourselves, which was probably the best way to view it. A suitably peaceful end to a windy but gorgeous day.

 

 

 

 

 

 

 

 

The following day dawned cloudy and wet, so we made the best of it with an expedition to Carreg Cennen, a ruined 13th century castle near Landeilo. Perched on a hilltop with what modern estate agents would probably call ‘commanding views of the surrounding countryside’, Carreg Cennen reminds me of all the castles I ever visited on school trips, when I used to clamber over ruined battlements and daydream heroically about swashbuckling exploits. As I recall, I was always an outlaw or daring raider, rather than any of the castle’s legitimate aristocratic inhabitants. Obviously watching too many episodes of The Flashing Blade had a lasting effect on me.

If you should go visiting Carreg Cennen yourself the most important bit of kit to take with you is a torch, because in the limestone underneath the castle is a long narrow cave that visitors can explore. In these modern days of health and safety obsessiveness it was heartening to be able to scramble down the steep narrow entrance passage, treacherously slippery steps and claustrophobic pothole unhampered by any kind of fussy warning notices. I for one thoroughly enjoyed banging my head on the low stone ceiling. Good old-fashioned British fun.

 

 

 

 

 

 

 

 

 

 

 

Since school term has started again after the Easter holidays my field teaching work is back in full swing at Rushall Farm and for the RSPB at Thatcham Nature Discovery Centre; but I also had an interesting photography job in mid-April, covering the opening of BBOWT’s new environmental education centre at Woolley Firs near Maidenhead. When I worked as a countryside ranger in Maidenhead a few years ago I met Woolley Firs Conservation Trust founder Rosa Lee, who was passionate about her vision to turn the site into an education centre for young people. So it was wonderful to see her dream finally realised, as a result of many years of hard work by herself, other trustees, corporate sponsors and of course BBOWT volunteers and staff.

After spending a hectic afternoon photographing VIPs and children from St Luke’s Primary School I had a chance to admire the site and all the latest interactive IT gadgetry that BBOWT education officer Lyn will be using when teaching. You can probably tell from my photos on the BBOWT website that the centre will be very popular with local schools, and I’m looking forward to popping in again soon for a visit to watch Lyn in action.

 

 

 

 

 

 

 

 

 

 

 

 

 

As the weather continues to be on the doleful and damp side, I’m snatching the opportunity to get and about whenever there’s a break in the clouds. Last weekend I managed to meet up with another friend for good long ramble from Pangbourne along the Thames towards Mapledurham. The photo above is of a scarecrow en route that has been steadily evolving over the several years we’ve been doing this walk.

 

 

 

 

 

 

 

 

 

On the slopes around Mapledurham there are fine examples of Chiltern beechwoods, and bluebells were just starting to come into full flower. Wafts of bluebell scent drifted towards us as we walked along: even with the occasional inevitable (you guessed it) heavy shower of rain, it felt good to be out enjoying the English spring. I am particularly fond of blue flowers and there’s something almost hypnotic about the indigo-blue of bluebells when they are blooming en masse. That intense blue haze striped with light and shadow is a particularly British woodland experience, one we should value highly. That our native bluebells Hyacinthoides non-scripta are threatened by climate change, habitat loss and accidental cross-breeding with the non-native Spanish bluebell Hyacinthoides hispanica is something that all of us should be concerned about. If you’re a gardener, I urge you to avoid planting Spanish bluebells if at all possible. It’s not always easy to find British-grown native bluebell bulbs or seed, but it is possible.

Our walk homewards led us back along the Thames valley to Pangbourne (resisting the urge to visit Mapledurham watermill, as the entrance fee was so steep it roused our righteous ire). One of the less usual sights of the Chilterns that we passed on our return journey was field after field of peacefully grazing alpacas. I failed to get a photo of one, although I did take a picture of a pleasingly spotty horse in a neighbouring field. I believe the technical term for this breed is appaloosa. I have long left behind my (exceedingly brief) horse riding days, but a childhood fascination with cowboys will never leave me and I feel sure that if I ever did get an opportunity to ride the range, an appaloosa horse would be just the ticket. With me wearing a black stetson, naturally. If it happens, rest assured you will read about it here.

 

 

 

 

 

 

 

 

Snake charming and lashings of ginger beer

 

 

 

 

 

 

 

 

 

 

It has been a few weeks since my last blog entry: part of the reason for this is shown in the photo above, i.e. it’s been lambing time at Rushall Farm. This has obviously kept the farm staff very busy, and likewise the education team – everyone wants to come for a visit during lambing time, so all the field teachers have been working flat out. Which is not say that it hasn’t been fun. I’ve had some great school groups and done a lot of striding about up hill and down dale in the sunshine. It’s been great to have become part of the regular team at Rushall, and I’ll be back there again throughout summer term too.

 

 

 

 

 

 

 

 

 

The preternaturally warm early spring weather lured me out on my days off work, too. I went on a pleasant trudge around Donnington Castle one Sunday in March, and explored the woodlands behind to see what wildlife was stirring (apart from a dozen or so Newbury families sunbathing on the grass around the castle itself).

 

 

 

 

 

 

 

 

 

Castle Wood is an ancient semi-natural woodland, a woodland with native tree species that has been there continuously since 1600 AD. Such woodlands often have high biodiversity: they are rich in plant, fungi and animal species and provide valuable habitats in the British landscape (which has lost almost 90% of its original woodland cover). As someone who has spent a not inconsiderable portion of my adult life up trees trying to stop roads being built through ancient woodlands, I am probably biased… But I do like a good old woodland to potter about in. It’s almost as much fun as rock pooling or beach combing: that same mix of wildlife discovery, striking landscape and a sense of adventure.

Ironically, it is human management of such woodlands that best conserves their wildlife value. Traditionally woodlands such as these would have been a source of timber and firewood, with some of the trees coppiced – cut down near the ground and allowed to regrow several smaller stems – on a rotation cycle, thus yielding a crop of timber but also opening up clearings and allowing flowers, insects and birds to flourish in the increased sunlight. You can see in the photo above a Hazel tree, which was probably last coppiced 50 years ago. In a ‘normal’ coppice rotation cycle, it would have been cut every 10 – 20 years, depending on what the resulting timber ‘poles’ would have been used for. Today woodland management such as coppicing is largely carried out by conservation organisations, although some land owners do harvest timber sustainably. At Rushall Farm, Joo – one of the field teachers – makes high-quality charcoal from wood sourced from the farm’s woodlands, which he sells locally. It’s always worth buying British charcoal rather than the stuff you see on garage forecourts – this is generally made from tropical forests. British charcoal burns hotter and cleaner, too.

 

 

 

 

 

 

 

 

 

I found this 7-Spot ladybird Coccinella 7-punctata trundling over the moss, happily prospecting for food in the mild weather. Good to see one of our native ladybird species as opposed to the now-ubiquitous Harlequin ladybird Harmonia axyridis, a species originally from eastern Asia which can out-compete and even feed on our native ladybirds. The whole ‘alien species’ issue is a hot topic in conservation and gardening circles, and rightly so: it costs conservation bodies, local authorities and environmental organisations millions of pounds each year to tackle problems caused by the spread of invasive plants and animals such as Japanese knotweed Fallopia japonica, New Zealand pygmyweed Crassula helmsii, and American Signal Crayfish Pacifastacus leniusculus. If you want to help control the problem, check out some of the links above and choose your garden plants carefully.

 

 

 

 

 

 

 

 

 

The warm temperatures have brought lots of spring flowers out early too: I spotted Coltsfoot Tussilago farfara beside the pond at Thatcham Nature Discovery Centre. This dandelion-like bloom always sends up its flowers with their curious scaly stems before its broad downy leaves appear. Reputedly the flowers can be brewed into a nice wine, whilst the leaves were once dried to make herbal tobacco. They have what I would describe as an apple-like scent if you crush them. The scientific name comes form the Latin tussis meaning cough: a syrup of Coltsfoot can be used to treat persistent coughing.

Cycling back from Thatcham along the towpath I came upon a whole bank of Sweet violets Viola odorata, many of the blooms the white variant of this particular species. As mentioned in my previous blog entry, I can’t get enough of violets so I lay full length on the bank in the sunshine, sniffing up their scent until my nose was anaesthetised and I had a big silly grin on my face. Luckily no-one came along the towpath at that point and found me, or they might have suspected I was under the influence of something slightly stronger than Coltsfoot wine.

 

 

 

 

 

 

 

 

 

It’s great to have so many peaceful and lovely natural spots within easy cycling distance of where I live. I took advantage of the continuing sunny weather to stop off for a picnic after a day’s teaching, in a secluded little spot tucked away in the reedbeds near Thatcham. Apart from the occasional distant roar of passing trains (a sound that I find quite soothing) it was basically just me and the Chiffchaffs (Phylloscopus collybita) doing their onomatopoeic thing in the willow scrub. A rye bread sandwich, a bottle of ginger beer and thou, as Omar Khayyam might have said had he been there. Which he wasn’t. So I got to drink a whole bottle of Fentimans ginger beer and eat all the posh crisps myself. Life doesn’t get much better than this.

 

 

 

 

 

 

 

 

 

Lest readers of this blog think I spend most of my time slacking off, I hasten to add that I have actually been working very hard over the past few weeks. One of my jobs is assisting ecological consultant Rod d’Ayala with the reptile surveys he is carrying out in the Greenham and Crookham Commons area. In particular, the surveys are aimed at identifying breeding and hibernation sites for Adders Vipera berus.

As Britain’s only venomous snake the Adder has unfairly been saddled with a fearsome reputation, but these wary creatures are very sensitive to disturbance and will usually get out of your way long before you see them. If you do something silly like trying to pick one up and get bitten, it’s highly unlikely to be fatal: the last death in the UK from an Adder bite was in 1975. If you stay on footpaths and don’t go poking around in the undergrowth on heathlands (where Adders tend to be found) then you should be safe enough. If you like to walk your dog in these areas, my advice is to keep it on a lead (which you should be doing anyway, if you’re walking through a nature reserve). As a reptile surveyor, I follow a specific route and check known locations for Adders and other reptiles, but even I find it hard enough to track them down. When I do come across an Adder I try my best to get close enough to take a clear photograph of the markings on its head and neck, as these enable us to identify individual animals and thus assess how well populations are faring on each site they are known to occur. The photograph below is of a particularly handsome and fat male I spotted on Crookham Common, curled up peacefully sunbathing in a clump of heather. Beautiful, isn’t he?

 

 

 

 

 

 

 

 

 

Of course I see lots of other wildlife while I’m out surveying for reptiles. On sunny days there have been quite a few butterflies about, including Brimstone Gonepteryx rhamni, Orange tip Anthocharis cardamines, Peacock Inachis io and Comma Polygonia c-album (pictured in the photo below). All of these early-flying species overwinter as hibernating adults (except the Orange Tip, which overwinters as a pupa), and consequently emerge in spring hungry for sources of nectar. You may also see them sunning themselves on south-facing banks or sheltered stretches of footpath, warming up their flight muscles ready to go searching for food. One thing that often surprises people is how territorial butterflies are: I watched a Comma sunbathing on a farm track at Rushall, where every few minutes it would dart upwards and see off any other butterflies that happened to fly past it (including a rather startled Peacock), with a rustle of flapping wings.

 

 

 

 

 

 

 

 

 

Whilst wandering through the woods at Rushall at the end of March I did see quite a few flowers blooming, including Primrose Primula vulgaris, Wood Anemone Anemone nemorosa and even some very early Bluebells Hyacinthoides non-scripta. Much as I love Bluebells, there is something slightly eerie about seeing them in flower in March… Climate change sceptics, please take note.

 

 

 

 

 

 

 

 

Another insect I spotted that appreciates Primroses and other spring flowers is the helpfully named Bee-fly, Bombylius major. Resembling a small bumble bee with its furry body and hovering habit, the Bee-fly also has an enormously long proboscis that it uses to feed on nectar, perching on flowers to do so. Female Bee-flies can often be seen flying low over the ground to search for tell-tale small holes marking the burrows of beetles, solitary bees and wasps. When they find a burrow they will lay their eggs in the soil, sometimes flicking them in with their legs. When the eggs hatch out they find a ready meal in the larva of the beetle, bee or wasp that was the original inhabitant of the burrow. Perhaps not the most savoury of life cycles, but I like Bee-flies: there’s something quite otherworldly about their appearance, and for me they are one of the signs of spring having truly arrived.

 

 

 

 

 

 

 

 

 

Sunshine and my allotment beckon, so my adventures over the Easter holidays (visiting a friend in south Wales) will have to wait until my next blog entry. I’ll wind this piece up by hoping that all of you have had a good Spring Equinox and Easter. As the hosepipe ban commences here in drought-ridden West Berkshire, I’m wishing for rain but hoping that most of it will come at night, rather than when I’m teaching school groups outdoors. Now where did I put my waterproof…

Lesser celandine (Ranunculus ficaria)