Tag Archives: endangered species

The Down Side of Remote Pacific Islands – The Disappearing Species of Hawai’i.

The Hawaiian Islands were formed in the middle of the Pacific Ocean by tumultuous volcanic activity – this is still happening and is presently centred on the Big Island, Hawai’i. Mt Kilauea on the south-east side of this island remains active and has been spewing lava almost continuously since 1984. Put simply, Hawaii is moving steadily over a hot spot that lies beneath the Pacific Plate.

To the west and more central to the island is the volcanic mass of Mauna Loa which rises just short of 13,700 feet; it has erupted only twice since 1950: once in 1975 for a day, and again in 1984 for three weeks. At the moment things are quiet, but it is still considered the most active volcano of recent time, having erupted 33 times since its first historical eruption in 1833. Not far away to the north across a saddle of lava stands the sister peak of Mauna Kea – presently dormant it rises to nearly 14,000 feet above sea level and I was fortunate enough to travel up it quite recently – this sounds impressive, but getting there is a doddle because you can drive more or less all the way. It is however the toughest road journey anywhere in the world should you choose to do it on a bicycle!

Of greater interest perhaps is that the slopes of these impressive volcanoes provide a variety of habitats entirely determined by changes in altitude. The most obvious way to experience climatic change is to travel from the equator to polar regions, which takes time and money, but there is an alternative: go to Hawai’i and ascend either Mauna Loa or Mauna Kea and experience similar changes over a much shorter distance.

A good start: photographing a green turtle on the local beach.

A few weeks ago my friend David Barlow and I did exactly this, driving from sea level to within a few feet of the summit of Mauna Kea, on the way rising through a variety of different habitat types to arrive above the tree line in a very short journey time: from a tropical beach to a stark arid landscape in a matter of hours, experiencing changes that were both marked and abrupt –  and I was able to make a visual record of species before we returned to sea level in less than twelve hours without rushing about.

The first bird of the day showed up during breakfast – a member of a flock that was picking off grass seeds on the lawn behind our apartment. Introduced from South America in the 1960s this attractive bird is now well established.

We then took a short walk to the beach and along the track saw a red cardinal in a non-native acacia tree. This bird was introduced to the islands in the late 1920’s from the Eastern States of North America; it has a formidable beak essentially for seed eater, but this colourful creature will take insects and other small animals, putting it into direct competition with native birds, or would, if there were any about! Almost nothing endemic exists at sea level apart from the occasional sea bird – a shocking situation that usually passes without comment. Few people realise the birds they see are recent introductions, and no tourist operator would break the mood by broadcasting that at lower altitudes, the most commonly seen creatures are as alien to these islands as snow at Christmas.

The yellow-billed cardinal is also common, it was introduced from South America in the early 1970s and is spreading. These birds occur mostly at lower altitudes, but have been seen more recently at around 6,000 feet where they come into contact with endemic species; this causes not only straight competition, but the possibility of spreading diseases such as bird malaria which the natives have no tolerance of.

Continuing on to the beach we came across a beautiful but nevertheless non-native tree under which a silver eye was feeding two fledgling youngsters. I know this bird well because it was often in our New Zealand garden, although it originates from the opposite end of the Pacific; the NZ version arrived from Australia sometime during the 19th Century, and this version is from Japan.

A Japanese white eye Zosterops japonicus feeding its young.

The Hawai’i white eye was introduced in the late 1920s; it is an agreeable song bird and an absolute sweetie, but like the yellow-billed cardinal, has spread to higher altitudes where it too competes with native birds. White-eyes are opportunistic feeders and as nectar makes up part of their diet this puts it in direct competition with native honeycreepers that have evolved on the Hawaiian Islands and can be found nowhere else.  Back in its homeland this is a delightful bird, but on Hawai’i it is becoming a problem.

One animal that seems to be everywhere at lower altitudes is the Indian mongoose, particularly where there is broken lava flow that provides this efficient little predator with ideal hiding places. This seems an odd choice for an introduction because the Hawaiian Islands have many delicate ecosystems that until recently were totally devoid of mammalian predators.

This less than ideal newcomer was introduced in the 1880s to take on the rat population so prevalent on sugar plantations. As rats are nocturnal and the mongoose diurnal the two seldom met, and together worked around the clock consuming Hawai’i’s native birds – in particular the ground nesters. It is claimed that the mongoose is responsible for the elimination of at least 6 native species from these Islands.

Rikki Tikki Tavi appears just about everywhere including the back of the barbecue on our deck.

I could continue working through a list of all the beautiful plants, butterflies and birds around where we are staying that are clearly non-natives, but if I did, we wouldn’t get much beyond the car park  so it has to be onward and upward. 

David and I began our drive to altitude by crossing the island using Route 200, or the Saddle Road as it is commonly known. This runs between the two volcanic masses of Mauna Loa and Mauna Kea, and as regards native species, we saw nothing until we got to around 6,000 feet.

Along the Saddle Road in the many areas that have experienced recent lava flows, plants are now re-establishing, a situation that has been repeated itself many times on Hawai’i.

At these higher altitudes in national park areas, plants appear very different from the exotic introductions commonplace at sea level. There were similarities to my New Zealand experience, with many native plants carrying smaller, more subtle flowers that many of us ignore in preference to bigger blousier forms that are easily introduced…. But what the heck, people just love dressing up their islands the way they decorate their Christmas trees  with exotic colourful tat that makes them feel more cheerful. Perhaps if we were better informed we might be inclined to consider our native plants more sympathetically, but the chances are… we  probably wouldn’t.

Pink Knotweed Perssicaria capitatum has small flowers, but isn’t a native, having arrived from Asia.

It is tempting to suggest species evolving on islands are delicate, but the reality is, most are well adapted to their surroundings, otherwise they wouldn’t have survived.  It is only when rapid changes occur that natives are found wanting, as was the case when Homo sapiens arrived on the Islands  adaptation through natural selection simply couldn’t equip the natives quickly enough to allow them to compete successfully with the many introduced pests they encountered.

Once up on the hill a mossy forest of native trees adds something quite hopeful to the stark surrounding landscape.

Just before turning off to Moana Loa we stopped to visit Hairy Hill on the opposite side of the road. It was a gentle walk up the old cinder cone that rises just a couple of hundred feet, providing enough height to survive a more recent lava flow that obliterated the flora of the surrounding area; what remains is a reservoir for native plants and trees, and amongst them there is a pleasant ambiance to the small isolated mossy forest that exists near the top, although moss is not be a surprise here because the area is often swathed in dank mists, imbibing the open lava flow below with a certain atmosphere – and it is no wonder that such places have spiritual significance for native people.

Looking down from Pu’u Huluhulu or Hairy Hill. This is a Kapuka, an older volcanic hill surrounded by a more recent lava flow.
I was surprised when a turkey crossed my path near the top of the Hairy Hill a bird very much out of place here.

On the opposite side of the road John Burns Way leads us up towards the summit of Mauna Kea. We stopped just short of the point where the tree line changed abruptly into a high altitude desert to emerge from cloud cover into bright sunlight. I pulled the car off the road at 9,000 feet so that we might acclimatise to the altitude; but had an ulterior motive: I’d hoped to photograph native birds in the area, but this would depend entirely on finding plants carrying nectar filled flowers to attract them in, otherwise we could search all afternoon and perhaps see birds only fleetingly. There is little to be gained by chasing wildlife about – if there was nothing to draw birds in to where I could stand quietly, the chances of getting worthwhile images was slim.

Common Mullien is everywhere.


We start searching on foot and it is at once clear that a great many unwanted plants have been introduced here, some accidentally; and eliminating them is likely to be an ongoing problem for park authorities. In fact, the weeds are so numerous and producing such copious amounts of seed, it might be a case of ‘know your enemy’ and prioritise those that are competing most harmfully with native species.

There was no shortage of Common Mullien Verbascum thapsus, originally brought to North America by settlers from Europe for medicinal purposes. It has now reached Hawaii and doing well at altitude on Mauna Kea.

David time lapses clouds as they roll up between the two volcanic peaks; every half an hour the top of Mauna Loa is revealed then disappears again, we however remain just above the cloud-line in full sunshine.

This volcanic mass we are on is the tallest mountain on the planet, but not recognised as such because the height of a land mass is always taken from sea level to provide a standard for the measurement of altitude. However, if Mauna Kea was measured from the ocean floor it rises to around 33,000 feet and there is nothing on Earth that will match it  – apart from the peak we can see across the saddle in front of us  that of Mauna Loa, which is around a 100 feet short of the volcano we are standing on.

At the time of writing Kilauea was very busy doing its thing.

To have two such massive features on an island that takes only a couple of hours to cross is remarkable. Everest is considered the highest mountain in the world at just over 29,000 feet it is part of the Himalayas – a mountain chain that pushed up like a rucked carpet when two continents collided: 50 million years ago the India plate started crashing into the Euro Asia plate and they continue to do so; but the Hawaiian peaks are perhaps even more impressive, thrusting as they do from the ocean floor driven entirely by the dynamism of volcanic activity.

Flowers of the Mamane tree Sophora chrysophylla.

It doesn’t take long to see a yellow flower, a member of the pea family, that is similar to the kowhai flower that I know from my time in New Zealand, which demonstrates that the relatedness of some plants can be clearly followed across the Pacific region, although how this member of the Sophora family arrived in Hawai’i remains a mystery.

I set up on a mamane tree and wait to see what visits.

The blooms I set up on hung from a mamane tree, a species integral to the upland forests of Hawai’i with flowers drooping down seductively from a canopy that can reach up to 50 feet. Unfortunately, the tree’s survival on the Hawaiian Islands has not been plain sailing: prior to and during the 1980s the upland slopes of Mauna Kea were ravaged by introduced grazers, and legal action was taken against the government at both local and federal level on behalf of two bird species. The resultant court case ended with a win for the endangered birds, in particular the Palila (Loxioides bailleui), a honeycreeper that relies heavily on Mamane tree seeds for food, as do  caterpillars of the Cydia moth which also feed on the young seeds of this tree and the birds in turn feed on them. Both bird and insect must avoid the mature seed coats because they are highly toxic, although these animals have developed a degree of tolerance to the alkaloid poisons that are present.  It appears the fauna remains just ahead of the flora in this evolutionary arms race and having gained the advantage, utilise the mamane seeds as an essential part of their diet.

As for the other battle – the legal one: on paper it was clearly a win for the birds and the environment, but in reality this wasn’t absolute. Soon after the judgement sheep and feral goats that for years had been decimating the upland forests were at last being removed, but the court order was never fully complied with until another court order was made in 2013 backing the protective measure, and renewing efforts to remove the pests that were pushing the Palila bird in particular to extinction. I am not certain of how successful this has been, but we at least didn’t see any alien grazers during our visit.

A tui in our New Zealand garden making use of nectar from a kowhia tree which carries one of the earliest blooms of spring. The birds beak is curved, and has co-evolved with the kowhia flowers to aid in pollination: pollen can be clearly seen on the upper side of the beak. This bird is of the honeyeater family and quite different from the honeycreepers of Hawaii, some of which have evolved similar beaks for the same nectar feeding purpose.

This is just one of a host of conservation issues that plague delicate island environments. Conservationists and volunteers do their best, but pest problems are frequently overwhelming, and there is usually a struggle for adequate funding.

The Sophora flowers blooming on Mauna Kea are as important to the native nectar feeding birds of Hawaii as the related kowhai flowers are to the tuis and bellbirds that regularly visited the trees we had planted in our New Zealand garden. Understanding such alliances is important and may prove instrumental in both protecting and bringing associated species together.

Certainly not the most exciting looking bird, but exciting for me…. I have no interest in ticking off birds, but as most of the park areas were closed due to the volcanic activity, the chance of seeing native birds was substantially reduced.

Back on the mountain I stood in the mid-day sun waiting… and it wasn’t long before a small bird came flying in to my chosen tree, but it was soon away with a dipping up and down flight that is probably peculiar to its species. I was pretty well set up by then and hopeful of a return visit – although this was not an entirely pleasurable experience, as standing in the sun at altitude with increased levels of UV will quickly sear exposed skin.

The bird made three further visits at approximately twenty to thirty minute intervals and remained completely untroubled by my presence. The little nectar feeder spent three or four minutes feeding on groups of flowers before flying off to presumably visit other flowers in the area; certainly it flew some distance beyond a point where I could see it, which suggested that it was feeding over a fairly wide range. 

Something about this bird might suggest a non-native immature white eye, but then the curve of the bill and the short tail makes me think it is a female or immature Hawai’i ‘Amakihi (Hemignathus virens virens) – not the rarest honeycreeper on Hawai’i  but nevertheless considered a distinct species for the island. This bird is also often confused with the Hawai’i Creeper (Oreomystis mana), but the creeper is rarer and does not feed so regularly on nectar. Hopefully, I might be forgiven for an uncertain identification of a bird I don’t regularly see. Even ornitholgist sometimes have trouble identifying these ‘little brown jobs’ and it might in the end come down to movement or behaviour… but most likely somebody will know from my pictures and I will soon be better informed.
Once I get to see the curve of the birds beak more clearly I feel confident that I have observed a native bird – a honey creeper with a beak adapted to feed from flowers, but still useful enough to dig out insects.

After a couple of hours acclimatisation we had achieved all that was possible and continued on to the summit. Almost at once we were on Mars, albeit a Mars with blue skies and genuine atmosphere; but the views were not as spectacular here as the Mars-scapes I’d previously seen near the summit of Haleakala which rises to just under 10,000 feet on the neighbouring island of Maui. From our vantage point we could at least see Haleakala coming and going some 35 miles away as clouds moved across the substantial peaks of both islands. Now close to  the 14,000 foot summit David framed the view and set his time lapse in motion.

David time lapsed cloud formations behind one of the Mauna Kea Observatory Telescopes with Haleakala on the island of Maui in the background – my still is rather a poor substitute.

I finished my photography fairly quickly – because wildlife opportunities are limited at this altitude – and was just admiring the view when David arrived with a young lady he had found, he left her with me and returned to his camera— the altitude had got the better of her, although her boyfriend had fared better and decided to walk back down to the visitors centre from where they had started out. David had agreed that we would drive his girlfriend down because of her condition. I sat her on the back seat of our car amongst the gear and told her how lucky I had been to photograph a honeyeater, but she seemed disinterested, obviously she wasn’t big on wildlife and so I stopped talking, at which point she shot out of the car and began projectile vomiting in a quite spectacular manner… I must admit that I did think about taking a photograph, but refrained from doing so.

The summit of Mauna Kea is not much further away, but I never made it up there, nor any other summit on any other mountain I have visited — it’s the kind of thing that can make you throw up, and I have no idea why people feel a need to do it.

Soon back in the car she began telling me how much better she was feeling. I smiled and nodded encouragingly and at once she took a turn for the worse and did it all over again. Hopefully it wasn’t the company she was keeping… more likely, having taken a meandering walk up in 40% less oxygen than there is at sea level and going that little bit further to the summit she had developed altitude sickness. It was clear that we needed to get her to a lower altitude as quickly as possible and so David’s time lapse came to an abrupt end and I was soon driving us towards the visitors centre considerably faster than when we had made our way up – thinking all the time that a four wheel drive would have now been quite useful. The dirt road had been rutted and tricky to negotiate on the ascent and I had driven slowly to look after the vehicle, but on the way down it was a different story.

Away in the distance Kilauea has a little spew.

 We were going quite fast — why wasn’t I sliding us off of the volcano? Then, it suddenly occurred to me — the grader I had noticed parked close by the visitors centre had been doing its job at an opportune moment and the track had been graded all the way to the top.

Half way to our destination, away in the distance Kilauea had a little spew of her own – signalling that tomorrow would be another murky VOG sky day, even on the other side of the island.

Hawai’i it seemed was presently troubled by one of  it’s little volcanic phases, but sadly the island also displays a good many environmental problems concerning the preservation of its endemic species… Nevertheless, even a true story should have a happy ending – so here it is. The girl and the volcano have stopped spewing now and both are doing fine.

Up above the clouds Mauna Kea is a Mars-scape but with atmosphere, where things can get very hot and very cold, but thankfully not to Martian extremes… because really, this is a very down to Earth sort of place.

There is also a moral to this story: a little bird recently told me that we all spend too much time obsessing over how beautiful things are, rather than how beautifully things fit together. Unfortunately, the latter requires far greater imagination and understanding than does the former, and more often than not, like many a good mixing of metaphors, we sometimes find ourselves on the right volcano, but chirping up the wrong tree. 

It wasn’t a great surprise that we didn’t see a Palila, but I have at least attempted a sketch.

I started the day with a little yellow bird that doesn’t belong, but didn’t manage to finish with the Palila – the yellow-headed bird that does – it was just too hopeful. Science has informed us quite thoroughly of what this rarity requires, and in that sense the tricky work has been done, but the will to save this beauty from extinction may simply not be there. And the way things are going – in the natural world at least – happy endings are increasingly difficult to find.



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On a recent visit to Hawaii, I hardly saw any native wildlife, a stark reminder that things haven’t improved since I first came to film for the B.B.C. back in the early 1980s.


Thirty five years ago I made my first visit to Hawaii at a time when travelling to distant tropical islands from the U.K. was considered exotic. In those days, you’d emerge from a plane into the shimmering light and once down the gangway steps walk to the terminal building with the heat of the sun bouncing beneath your feet like a playful pet; and just as you were beginning to appreciate that life was all the better for being here, smiling girls in traditional dress would come out to greet you and place flower leis around your neck.

But things have changed… the sun still shines, but on more recent visits I couldn’t fail to notice that the girls were no longer present – the Honolulu Airport terminal is bigger now, reflecting that there are many more travellers coming to Hawaii and if every visitor was still receiving a traditional floral  greeting, the islands would pretty soon be clean out of flowers.

People still smile though, and the pace of life is slower than many of us are used to; pretty soon you feel relaxed because it’s difficult to find these islands anything other than enchanting, but my first couple of visits were not the magical encounters with paradise that I had imagined – mostly I was filming ten hours a day in a laboratory at the University of Hawaii.  I’d been sent by the B.B.C. to film a variety of tiny creatures and two oddities in particular – both spectacularly unusual carnivorous moth caterpillars.

Anything that has a sensory rear end that alerts to an approaching fly and then flips its front end over backwards to grab the unwitting insect in its jaws in a mere fraction of a second is a real attention grabber, but the little critters are just so small and well camouflaged, that if you didn’t know they were there, they’d might just as easily be  another twig on the tree.

Where else but in Hawaii could you find an insect so clearly associated with feeding on leaves that has switched to eating insects? And not just any insects, in this case Hawaiian fruit flies that have evolved to become spectacularly large, but nevertheless will go down twitching as they are eaten alive.

It doesn't seem likely, but there is is... a moth caterpillar Eupithecia streurophragma feeding on an Hawaiian fruit fly.
It doesn’t seem likely, but there it is… the moth caterpillar Eupithecia streurophragma feeding on an Hawaiian fruit fly.

 Hawaii is an extended chain of islands which has formed over a mid-Pacific hot spot of volcanic activity,  roughly equidistant between Eurasia and the Americas; and to get to either requires an approximate two and a half thousand mile journey either east or west across the Pacific Ocean. It was this creation of land by fire combined with a perfect storm of circumstances that allowed for the evolution of so many unique and unusual lifeforms.

These Islands might be regarded as a natural laboratory for the study of evolution, and if Charles Darwin had landed here rather than on the Galapagos Islands he would have come to similar conclusions about how species evolve when  separated from their relatives on distant mainlands, and even from those isolated on different islands… but Darwin would have needed to be paying attention (clearly one of his strengths), because many of the animals concerned are small invertebrates, such as spiders, insects, crustaceans and molluscs.

Certainly limited numbers of creatures would have made it to the islands to start the evolutionary ball rolling and no large animals were amongst them – other than those that could  swim here – turtles for example, and they never get further than the beach. Consequently no native reptiles, amphibians or mammals ever made it to the islands until their arrival alongside man, either as stowaways or transported intentionally, with frequently disastrous consequences to the native flora and fauna.

Small arthropods such as insects, spiders and crustaceans will most likely have arrived on floating vegetation, the lucky winners hitting this narrow window of opportunity, whilst the majority missed the jackpot and drifted on across the world’s largest ocean to become lost at sea.

The initial arrivals had the advantage of making landfall on uninhabited islands which provided a variety of empty niches ready to move into – and those that managed to adapt to their new circumstances would have radiated out into different habitats to eventually form species that were unique.

The Hawaiian Islands were at one time or other no more than volcanic larva flows and it is no surprise that the wolf spider Lycosa has evolved adaptive colouration to live in what might elsewhere be considered unusual surroundings, in particular larva cinders in desert areas.

The habitats available for life in Hawaii were varied, and included not only forest, grass and wetlands, but also larvae flows, deserts, beaches and caves – all of these would become populated by invertebrates; there is even an small creature (the wekiu bug) that lives at altitude, sucking the juices of insects that have been caught up and preserved in snow and ice to be released many years later as frozen dinners along the thaw line of Mauna Kea, a dormant volcano and the highest point in Hawaii.

A cricket that appears so well camouflaged on larva flow I could just as easily have photographed only the larva flow and then tell you it was there.
A cricket that appears so well camouflaged on larva flow that I could just as easily have photographed only the larva flow and just pretended it was there.

One species peculiar to the Islands is the happy-face spider, which derives its name from an apparently smiling face on the upper side of its abdomen; this tiny spider mostly lives and hunts on the underside of leaves and despite its size is visuality impressive.

The morph shown below is the one most commonly seen, but there are a variety of others that have extraordinary clown faces on their rear ends and you might want to Google  ‘ happy face spider images’ to see more impressive examples. The spiders have made it onto four Hawaiian islands but are not yet on Lanai, nor have they managed to get as far west as Kauai.

I had a couple of happy face spiders to film, but since I photographed them many more extraordinary faces have been captured by by photographers. Just Google Happy Face Spider to see some extraordinary morphs.
In 1980 I had only a couple of happy-face spiders to film – the disappointment was their small size, which made filming their behaviour a challenge.

It appears that almost everything that arrived in Hawaii evolved into  something special… but then man arrived and the party was over, which is a sad but familiar story!

The islands by dint of their remoteness have undergone extraordinary speciation in the absence of too many predators or competitors, but once these were brought in from elsewhere, many native species were immediately threatened. Indigenous plants and animals have become well adapted to their circumstances but they have not evolved appropriate defences against the onslaught of the new invaders. And so it was, that species in existence for millions of years, were snuffed out by the newcomers like candles in the wind.

Many of the new arrivals were so closely associated with man and his agriculture that with the additional advantage of a perfect climate they thrived in their own little paradises within paradise – and from there ventured out to invade other places on the Islands.

The first aliens will have come in with the Polynesians between 300 and 500 A.D. Then the Europeans showed up; it is possible that the Spanish arrived a couple of hundred years before Captain Cook made landfall in 1778, but it is Cook that we remember because he claimed the Islands as British territory, which now counts for little more than the hoisting of an interesting union flag colonial combo.

Flags are not traditionally Polynesian; these two flutter beneath an Hawaiian sky as a reminder of the transient nature of colonialism.
Flags are not traditionally Polynesian; these two flutter beneath an Hawaiian sky – a reminder of the transient nature of colonialism.

The islands were named after Cook’s sponsor, the 4th Earl of Sandwich – the very same Earl who found himself disinclined to leave a gambling table and suggested to staff that they bring him food conveniently held between two pieces of bread… the rest of course is history… as is the case for the naming of the Sandwich Islands which later reverted to their more appropriate Polynesian name – or at least a close approximation to it.

Colonisation would be instrumental in the devastation of many indigenous species causing the rapid degradation and destruction of habitats; this combined with alien introductions became the driving force for many island extinctions.

It was decided that I would film snails to illustrate the troubles caused by introduced species and I was pleased to be filming at least some of them out of doors. There are many valid reasons for filming animals in their natural environments, but invertebrates are often the exception, usually their behaviour is not much affected as long as their living conditions are adequately simulated.

Prior to the early 1980s film stocks were limiting and a lot of light was required to capture the activity of any small creature in movies. This was just before cold light using fibre optics became widely available, and I had to devise my own water cooling system bolted to the front of lights which required a constant flow of cold water to substantially reduce temperatures. In the years to come I would replace my cumbersome system with cool fibre optic lights; this was really helpful because invertebrates can’t cope with excessive heat, but rarely are they bothered by extra light, and for the best results good lighting was essential.

Filming in the lab (way back when) with Steve Montgomery (right). We are checking that the carnivorous caterpillars are happy under my water cooled lighting system - a year later I had the benefit of fibre optic lights.
Filming in the lab (way back when) with Steve Montgomery (right). We are checking that the carnivorous caterpillars are happy under my water cooled lighting system – not long after, cool fibre optic lighting became available.

There is also a moral question as to whether this is truly wildlife photography, but imagine carting all of this gear into the big outdoors to capture perhaps fifty different creatures in various locations across the islands – setting up on steep slopes for example – because hardly any fertile natural environments have escaped cultivation on the flat – and then there are the cave habitats which are a nightmare to get equipment into. Time and budget constraints required everything to be done in a few weeks (and today these constraints are even tighter). There was then little option other than to bring many of the smaller creatures to one place in order to get the job done.

Taking a still flash photo on location is one thing, but filming the very tiny with plenty of light without any vibration has always been a wind up, and there is the additional problem that when visiting delicate environments trampling has to be avoided, along with the possibility of losing invasive species to the wild. Back then, despite all the disadvantages that the real world presented to macro-photography, I still had to establish some environments on wider lenses and in the process was determined to film at least some of the native snails in the big outdoors.

I was once embarrassed to lose a large tortoise whilst filming in Africa – it made off (across its natural habitat) when I left for a short while to fetch a lens – I had assumed that it wouldn’t get too far, but of course, tortoises run at breakneck speeds when you stop watching them.

I learnt a valuable lesson… but even at my most inattentive, I thought it unlikely that I could misplace a snail, not even a well camouflaged individual, but the truth is, it’s easy to lose sight of almost any snail by simply looking away… and given half a chance they’ll dash off and hide under a leaf when you do. Living in a small world – your perspective on life changes and when you’re not worrying about snails rushing off to hide, you’re worrying about the fact that some move so slowly they won’t register as moving at all in real time. But of course, things could have been worse… ants are always in such a rush, so it was great to discover that there are thought to be no native ants living on the Islands at all.

There are more than 40 species of  endemic tree snails living on the Hawaiian Islands and all are endangered - this one seems hardly to have managed to have held on to a protective shell at all.
There was once around a hundred species of tree snails in Hawaii and now only about a quarter remain – most of which are endangered – and this one seems hardly to have held on to a protective shell at all.

Until recently Hawaii held the most diverse representation of land snails anywhere in the world, but since the arrival of humans it is likely that around 75% have become extinct. Habitat loss will have played a part, but many have been eaten out by introduced predators, in particular predatory snails.

After the African land snail Achatina fulica was introduced – it’s a monster and ends up elsewhere either as a food source or as a pet – it soon became clear that the newcomer was munching its way through the Hawaiian natives, and so another predator was introduced from Florida – the rosy wolfsnail (Euglandina rosea)  to control it – and there wouldn’t be much of a story unless the new arrival had set about the native snails even more ferociously than the problem snail it had been brought in to eliminate, which of course it did, reducing native species even further, and pushing some to extinction… This was without doubt a ‘doh!’ of Homer Simpson proportions.

It is clear that when humans get environmental issues wrong, they make a really great job of it, and often eliminate species that have evolved to become spectacularly different from anything else on the Planet. The problem is, that when this happens to invertebrates… hardly anybody notices.

A native Hawain tree Snail (below) does the dance of death with an introduced predatory species - Achatina fulica which predates upon unfortunate natives.
A native Hawain tree Snail (below) does the dance of death with an introduced species – the rosy wolfsnail Euglandina rosea which predates upon the unfortunate natives.

 It is the larger cuter animals that usually grab our attention, but when it comes to extinction we need to consider the smaller things in life, because if we include them, the losses that are presently occurring on a worldwide scale indicate that we may be entering a mass extinction event. Long term, this makes no difference to the Planet, but species diversity remains the best measure of the prevailing conditions for life on Earth and that is an important consideration for all of us.

Our own well being can be gauged by what is disappearing around us, and it is possible that any who travel might at one time or another hit the jackpot, and take a picture of some small creature that is unknown to science. Seeing the bigger picture means looking out for the small stuff, which is one of the best ways to save the Planet… or more precisely… the life upon it.


Roger Jones supporting Steve Montgomery (with the net) collecting specimens for filming in 1980.
Roger Jones supporting Steve Montgomery (with the net) collecting specimens for filming in Hawaii -1980.

With thanks to former BBC Natural history producers Richard Brock and Roger Jones who gave me my first opportunity to film the natural history of Hawaii, Ken Kaneshiro for fruit flies and lab space, Frank Howarth for his cave critters and Steve Montgomery who collected many of the specimens for filming; he has been foremost in discovering many new species on the Hawaiian Islands and continues to do great work bringing the uniqueness of island biodiversity to the rest of us.

For more on Hawaiian extinction see: 


For details on Hawaiian tree snail and other species see:


and for a more detailed description of Hawiian snail status from 1990  (please note that numbers have declined since this paper was published):


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