9.28.2007

This week’s most viewed stories

The most popular stories on Earth-Touch in the past week (from Friday 21 September to Thursday 27 September 2007) were:


Number 1

Elephants race for water

As it gets hotter on the edges of the Makgadikgadi Pans, so does it get busier around this waterhole. A group of six elephant bulls came running towards the water as their thirst intensified. Animals compete fiercely for water in Botswana's arid Kalahari desert because it’s a scarce resource.



Number 2

Colour burst of carmine bee-eaters

About 30km (19mi) north of the Nxamaseri Channel on the Okavango River, Botswana, is a place where the river breaks out of the papyrus-dominated wetland and streams out into the Kalahari. Hundreds of carmine bee-eaters return to settle on the vertical face of a river bank, their brilliant plumage vivid against the red earth and the deepening sky.



Number 3

Whale watching

In this clip, groups of southern right whales play in pockets of warm water close to the coastline. It was a still and calm morning with a slight fog carpeting the mouth of the Breede River where it spills out into the Indian Ocean near Cape Infanta on the south-eastern coast of South Africa.




All images © Earth-Touch 2007

Did you know? Amazon Basin


The Amazon Basin in South America covers some 6.7-million square kilometres (2.6-million square miles), which is more than two-thirds the size of the USA. It produces about 20% of the world's oxygen.

Visit Enchanted Ecuador forest to share the Earth-Touch field crew's first day exploring this amazing ecosystem.


Image: © Earth-Touch 2007

Kudus move with grace


Despite their size, kudu (Tragelaphus strepsiceros) strike elegant poses as they browse and drink, as you can see in the Earth-Touch clip, Kudu drink in early morning. This was filmed in the Boteti River bed near the Meno A Kwena camp in the Kalahari Desert, Botswana.

A grown male kudu weighs up to 250kg (551lb) and a female 200kg (441lb). The males have symmetrical spiral horns longer than 1m (3ft) from head to tip.

Horns start growing when the animal is five months old, curving at 14 months, with a second curve appearing by about 30 months. Horn growth continues throughout the male’s life. Usually only males carry horns but they are sometimes seen on females.

Image: © Earth-Touch 2007

9.27.2007

Did you know? Ostrich eggs


Ostrich eggs are the largest of any bird species, and are hard and smooth. They are larger than a grapefruit, and weigh more than 20 times as much as a chicken’s egg.

The smallest birds’ eggs are laid by hummingbirds.

Watch a group of meerkats examining an ostrich egg with great curiosity in the Earth-Touch clip, Egg stirs meerkats’ curiosity


Image of meerkats and ostrich egg (top) © Earth-Touch 2007. Image of ostrich egg (bottom) courtesy: Wikipedia

Guilty as charged?


By Reina Luck, editorial team

Earth-Touch crew member Pierre Minnie’s confession of the guilt he feels when he slices up bits of the Amazon forest with a machete evoked similar emotions in me. I, too, have been racked with guilt while slaughtering those pesky aphids on my rose bushes with squirts of foul-smelling poison, simply because it's more convenient than cooking up an organic elixir of fresh garlic, laced with a dash of dish-washing detergent and a teaspoon of chilli powder, as our friendly local radio gardener is always exhorting me to do.

So, determined to do my bit for the earth, I toddled off to the hardware store to buy some of those long-life, low-energy light bulbs that everyone is so enthusiastically punting these days.

Sounded simple enough.

Until I found myself faced with a whole new range of ‘wattages’ which bear no resemblance to the old 60- and 100-watt jobs that I'm used to.

No clues are offered as to whether an 18W twirly-shaped thingie that looks like an ice cream cone is going to be sufficient to light the pages of my book for bed-time reading, or whether it’s intended to flood my entire aphid-free garden – and those of my neighbours on either side – with sufficient brilliant white light to scare off burglars and keep all the birds awake all night.

Being of a fairly practical nature, I decided to start off by buying a small range and trying them out in the various spots where I needed them. Having parted with sufficient cash to sponsor a whole family of polar bears for a year, I proudly carried my stash off and set about putting them in place.

Let’s just say that I am now the owner of a range of low-energy bulbs, only two of which were of any use at all. The rest either had a bayonet fitting instead of a thread; stick out of the designated light fitting like a fat, accusing, luminous finger; or turned out to be so dim that a candle would have been more use (and a hell of a lot cheaper).

Undaunted, I decided to start sorting out my rubbish with a view to taking it all to various destinations for recycling. I soon discovered that there is more to this than meets the eye. My kitchen is of the small, modern variety with only enough space for one small dustbin – so where was I to put all the other bins that I need for glass, cans, paper, combustibles, PET, and all those old high-energy light bulbs that I had so recently thrown out?

Lining them up in the alleyway outside my unit immediately aroused the wrath of the body corporate and elicited a nasty letter from the trustees demanding that I remove them immediately, or face arbitration or death by hanging or both.

Naturally I rose to the challenge and decided to scout out all the places where I could take my garbage to be recycled. The plan was to keep the absolute minimum hidden under the stairs in my house, in eco-friendly brown paper bags, and then to cart them off to these places once a week for disposal.

Only to discover that in order to achieve this in one go, I would have to burn enough fossil fuel driving the 50km (30mi) or so it would take to do the rounds of all the various drops and dumping sites to melt another cubic metre (35 cubic feet) of ice off the polar ice caps – a thought too dreadful to contemplate.

To quote from the movie Over the Hedge: “The more things change, the more they remain ... insane!”

Turtle mystery solved


The hatchlings of the green sea turtle (Chelonia mydas) enter the ocean soon after they are born and vanish for up to five years. For 50 years, researchers have been unable to explain what happens to them during this period, before they return closer to shore fully grown.

Now, LiveScience and Newswise report, scientists from the University of Florida have found that these turtles live in the open ocean, where, contrary to what was previously thought, they are carnivorous, feasting on jellyfish and other marine creatures.

The scientists collected samples from the shells of 44 green sea turtles at a site near Great Inagua in the Bahamas (28 of which had been previously tagged and could therefore be identified as residents of the area, and 16 new arrivals).

They then analysed heavy and light stable isotopes of carbon and nitrogen from both the oldest (earliest-grown) and newest sections of the shells. The isotopes indicate what the animal has been eating and where in the ocean it has lived.

The results of the analysis indicated that the green sea turtles spent their early years in the deep ocean feeding as carnivores.

Details of the study were first published in the journal Biology Letters.

IMAGE: Green sea turtle, courtesy National Oceanic and Atmospheric Administration.

9.26.2007

Whales: how close is too close?


By Graeme Duane, field crew

In preparing for our whale expedition to the Western Cape, South Africa, Barry Skinstad and I looked into the laws and ethics relating to approaching whales. Apart from proposed new laws, the existing restriction is that a boat may not get closer to a whale than 300m (328yd). Though it’s difficult to measure that distance while out at sea, it’s clear that you’re not to disturb any cetaceans (whales, dolphins or porpoises) while you’re on the water.

Having arrived in Witsand, between the towns of Hermanus and Mossel Bay, and shot land-based footage of numerous southern right whales lounging in the bay, we set off to sea to get a different perspective. It quickly became apparent that photographing whales from a boat is extremely difficult. If you can’t go close to the animals, a strong stills zoom lens is your best bet.

After a few days we started to learn. A bit of patience goes a long way with whales. We found that if we motored into the general area where the whales were, then switched off the engines and merely drifted, eventually (whether by chance or choice) a whale or two would make its way over to us and come up very close.

This got me thinking: it was quite apparent that whales don’t like the noise of an outboard motor close by, so what to do about the distance restriction in a situation where the whale swims up to your boat? I considered starting up and motoring away, but this would have startled the whale. It seemed more ethical to let the whale drift past the boat of its own accord.

With our newfound patience technique, we managed to get some amazing shots. The best was when I’d dropped Barry over a sunfish that was basking near our boat. I drifted away and when the sunfish took off out of fright, Barry turned around and nearly jumped out of his skin when he saw three adult right whales ogling him! They stuck around just long enough to satisfy their curiosity and then rolled off to continue their daily chores.

So I’m content to say that we never once drove at a whale, and never drove within 300m (328yd) of one. All the encounters were on the whale’s terms and we tried to make the most of the chances we had.

  • Watch Graeme Duane’s Earth-Touch footage of southern right whales, filmed on 20 September 2007: Whale watching

Image © Earth-Touch 2007

Scientists uncover hotbed of bat bug deception

PICTURE: An African bat bug. Image: Courtesy, Wikipedia

Scientists have made a mind-boggling discovery about the African bat bug (Afrocimex constrictus), LiveScience has reported.

Male bat bugs, close relatives of bed bugs, possess fake female genitalia and most females impersonate males by having genitals resembling the males’ fake ones.

Research team member Klaus Reinhardt, an evolutionary biologist, remarked to LiveScience, “We ended up uncovering a hotbed of deception … Nothing like this exists anywhere else in the animal kingdom.”

Sex among African bat bugs is violent, as the males pierce the abdomens of their mates, and scientists suspect that females emulate fake male genitalia to minimise sexual attention from males.

Why males have these fake female genitalia remains a mystery and Reinhardt describes the phenomenon as one of nature’s strangest.

Although the fake genitals are convincingly similar they do not have a covering over them as real female genitals do.

Details of the study will be published in an upcoming issue of the journal American Naturalist.

Did you know? Bee-eater


Bee-eaters are typically brightly coloured and have streamlined bodies and long tail feathers.

Though they do eat other insects, their favourite prey is bees, which they catch in flight and then beat against a perch, thrashing out their venom.

The southern carmine bee-eater (Merops nubicoides) (pictured above) gets its name from its bright red colouring. Bee-eaters are colonial cavity nesters, breeding in sand banks near rivers.

See the spectacular colours of a flock of carmine bee-eaters nesting in their summer home, on a bank in the Okavango Delta, Botswana, in the
Earth-Touch clip, Colour burst of carmine bee-eaters.

Images © Earth-Touch 2007

9.25.2007

Did you know? Wrecks form coral reefs

Shipwrecks often form natural coral reefs alive with colourful corals and an abundance of underwater life, as is illustrated in the Nebo shipwreck.

The Nebo was a 2000-ton steamship that sank off the South Coast of KwaZulu-Natal in 1884, on her maiden voyage from Sunderland in the United Kingdom to Durban, South Africa. It was carrying a railway bridge for Amanzimtoti, a town just south of Durban, aboard, when it sank. It now lies upside down about 1km (0.62mi) north-west of Aliwal Shoal.

In the Earth-Touch video, Diving the wreck of the Nebo, angelfish, goldies and catfish swim amongst the multi-coloured tree-like corals that have developed around the wreck.

Image: Copyright Earth-Touch 2007

Help us to identify this butterfly species!


Identifying butterflies is notoriously difficult. We aren't sure what this species is, captured on film by our crew along the Cuyabeno River in Ecuador. Perhaps it could be Glutophrissa Drusilla or Melete lycimnia?

Ecuador is in fact home to about 4 500 species of butterflies!

See these beautiful butterflies in the Earth-Touch video, Enchanted Ecuador forest and please post a comment on this blog entry if you have any ideas about their identity.

Images © Earth-Touch 2007

9.24.2007

What would you like to see on Earth-Touch?

Earth-Touch has so far brought our users footage of wildlife from three continents: Africa, North America and South America.

Geographical diversity and ecological diversity go hand in hand.

We
ve brought you video of a wide range of species, from great white sharks swimming off the coast of South Africa (see Spellbound by great whites and Eyeball to eyeball with a great white shark), to endangered African skimmer birds nesting in the Okavango Delta, Botswana (African skimmers protect and nurture chick and others).

An Earth-Touch team traveled to Ecuador to bring you footage of some amazing insects (The march of the leafcutter ant), among many other types of animals and birds.

And our first footage from North America came from central Florida in the United States, Morning birds of Myakka.

Now we want your feedback – we want to know what you would like to see next on Earth-Touch. Do you prefer footage of mammals, birds, reptiles or insects? Do you crave footage from Antarctica or the Australian outback? What is your favourite location so far? Please tell us what you would like to see more (or less) of? Please post your comments in response to this blog.

Our most popular stories of all time are:




Number 1

Meerkats huddle in the cold

A group of suricates – more commonly known as meerkats – return from their daily forage to huddle together in the bitter cold, before disappearing into their burrow.






Number 2


Eyeball to eyeball with a great white shark

One-on-one interaction with a great white shark in its natural habitat makes for breathtaking viewing.






Number 3

Serval feasts on mamba

A serval cat feeds on a snake she has just killed – an uncommon sight, especially as the snake is a deadly black mamba.





Which of these is your favourite and why? Is there a clip not mentioned here you would like to bring to the attention of other users?

Have your say and your choice may be featured on Earth-Touch soon!

Images © Earth-Touch 2007

Did you know? Shark species

There are more than 400 species of shark in the world’s oceans.

These predators are feared by many, but only 12 species of sharks actually pose a danger to humans. We are, in fact, more likely to eat shark ourselves than be eaten!

Earth-Touch has filmed a number of different shark species in the Indian Ocean, off the east coast of Southern Africa, in the past few months. Our shark footage seems ever-popular with users, given the amount of views they generally attract.

View the Earth-Touch shark footage we’ve brought you so far (featured species in brackets):

Blackfin sharks at close range (blackfin)
Lone ‘raggie’ lies in wait (ragged-tooth)
Male ragged tooths dominate Cathedral (ragged-tooth)
Cathedral teems with fish (ragged-tooth)
Surrounded by blacktip sharks (blacktip)
Searching for ragged-tooth sharks (ragged-tooth)
Inquisitive blacktip sharks (blacktip)
Tiger sharks at close range (tiger)
Eyeball to eyeball with a great white shark (great white)
Spellbound by great whites (great white)
Blacktip sharks jostle for titbits (blacktip)

Great white shark near Hermanus, South Africa
(top), and blackfin sharks near Scottburgh, South Africa (bottom). Images © Earth-Touch 2007

9.21.2007

Have plant guilt, need counselling

By Pierre Minnie, field crew

When I arrived to film in Ecuador it took me a long time to overcome my ‘plant guilt’.

On occasion, when walking on jungle paths, we had to trample and machete our way through sections of the undergrowth that had become overgrown. I felt bad about destroying the plants but was reassured by my guide that we were not denuding the vegetation and that the plants would grow back quickly in the tropical climate.

Back home in South Africa I have ‘indigenous guilt’. I am convinced that I should have an indigenous garden but I planted a Thai lime leaf tree (Citrus hystrix) in my garden this week.

A refrain from Carl Orff’s Carmina Burana was ringing through my head. Pater Peccavi – I have sinned!

I was feeling uncomfortable because I had planted an exotic tree again. My garden already has a collection of foreign and exotic plants, and I had just added another one. I convinced myself that, as a Thai food lover, I need fresh ingredients to do justice to the cuisine. Weak excuse?

I also have ‘mulch moments’.

Years ago, our esteemed Earth-Touch leader convinced me that good composting and mulching on cultivated ground was mandatory. I religiously apply this advice to my garden and although it has become a way of life for me, it has also created problems.

I play ‘musical chairs’ with my plants and am continually moving and replanting them to get the perfect placement and composition. Of course it is never perfect, which then demands another reshuffle. This results in sections of my garden always being under construction and un-mulched. This brings on the guilt feelings again.

Then there is my ‘conserve garden water’ issue.

And my ‘what is a weed’ issue …

Any counsellors?

Watch some of the
Earth-Touch coverage Pierre Minnie and Nick Fenn filmed in Ecuador:

Images: Amazon forest (top); Pierre Minnies lime tree at home (middle and bottom). Copyright Earth-Touch 2007

This week’s most viewed stories

The most popular stories on Earth-Touch in the past week (from Friday 14 September to Thursday 20 September 2007) were:

Number 1

Blackfin sharks at close range

A small shoal of curious blackfin sharks gradually grows into a mob as more and more swim up close to investigate the strangers in their space.



Number 2

Enchanted Ecuador forest

Our first expedition into the equatorial jungle of Ecuador reveals a plethora of new species, from delicate yellow butterflies and hoatzin birds with long crests, to ‘chorongo’ monkeys.



Number 3

Elephant and zebra at desert waterhole

The daily jostling for position by the zebras at the waterholes is interrupted by the arrival of several thirsty elephants that use their superior size and strength to intimidate the smaller animals.




All images © Earth-Touch 2007

9.20.2007

Ants on the go

The creatures in the Earth-Touch clip The march of the leafcutter ant are truly amazing.

Leafcutter ants cut up leaves with their jaws, which act like miniature power tools and vibrate at a thousand times a second.

They carry the leaves to an underground nest that sometimes includes 1 000 or more chambers and houses millions of ants. In the nest, the ants grow fungus on the cut-up leaves. Different ant species of the same family grow different types of fungi to provide food for the ants.

These ants are deceptively strong for their size. One ant can carry a piece of leaf weighing 20 times more than itself, for long distances, often with another smaller ant perched on top of its load! The smaller ant acts as a sort of watchdog, looking out for a type of fly that lays its eggs on the leaves. If the fly larvae hatch, they can seriously damage or destroy an entire colony of ants.

Image © Earth-Touch 2007

Did you know? Giraffe communication

Giraffes, like elephants, communicate mostly through infrasound, which is inaudible by humans.

They do, however, sometimes grunt, and make whistle-like noises as well. Mother giraffes whistle to their calves, which may in turn mew. Giraffes will also grunt and snort in alarm.

A male giraffes will cough loudly and repeatedly in the presence of a female in oestrus.

Watch the clip, Silent sentinels, one of the first Earth-Touch ever served.

Image: Copyright Earth-Touch 2007

Sunrise, sunset


By Andy Crawford, field crew

The end of each day in the bush is always a strange and wonderful time. Wherever I am at sunset (usually up to the elbows in plastic fish, ducks and crocodiles while bathing kiddies in a tin bath under an acacia tree) the soft orange glow on the trees, evening birdcalls and insect going-to-bed noises invariably make me pause and take notice.

It is an evocative time, a time to reflect on the day that has been and the night that is to come – with all its potential for drama and danger. Watching the serene impala grazing on the floodplain in the last light of the day I always think of their evening ahead and wonder that they are not all neurotic gibbering wrecks at the prospect of enduring yet another long night in the bush with numerous fanged creatures just waiting for darkness to begin their hunt.

This ability to be so oblivious to their vulnerability is their evolutionary survival mechanism that saves them getting ulcers and dying from a variety of stress-related illnesses, a mechanism that those living in Jo’burg, where I currently do, and in big cities around the world, are still working on. Most Jo’burgers have some horrific nighttime musings, but thankfully in the bush one can feel secure in the notion that it is not you that is going to be the prey.

Lying in a cosy bed in a cosy tent, one feels infinitely safe, despite the fact that all that separates you from the beasties lurking in the blackness is a thin sheet of canvass that could be shredded by a mouse, let alone a larger predator.

Even a mosquito net slung up from a tree will form a sufficient barrier – both physically and mentally – to ensure a sound night’s sleep. And as I lie there, listening to the hyenas whooping and the lions roaring and the impala snorting, I am always so thankful that I am not “out there” in the night. And the next morning, against the backdrop of the red rays of the rising sun and the woodland kingfishers calling, the impalas are again grazing serenely on the floodplain,without a thought about the night to come …

Images: Copyright Earth-Touch 2007

9.19.2007

Girl or boy? How does one tell?

By Andy Crawford, field crew

Distinguishing the gender of wild animals is often no easy task. Certainly with some species the presence of obvious markers (such as horns or manes) make it simple.

However, with certain species it is almost impossible. Hyenas are notoriously difficult as the females have external genitalia exactly like those of a male. The size and attitude of the hyena are the only factors that give one an indication of its gender – the females are significantly larger than, the males, and are more dominant.

Size and attitude as a general rule of thumb can be the distinguishing factor, in the absence of the usual clues such as horns or genitals. Other than hyenas and a few other animals, it is the males of a species which are usually larger.

With zebras it is surprisingly tricky to distinguish one gender from the other. On close inspection one can tell zebra males apart from the females by their thicker necks and larger heads. The females have smaller heads and – often pregnant – rounder bellies. The males spend quite a bit of time engaging in mock fighting and checking (by means of scent) the receptiveness of their harem of females.

Buffalo bulls can be distinguished from the females by size – a mature bull can weigh as much as 900kg (1 984lb) – and the “boss” on their head.

The horns of a buffalo grow out to the side from the top of the head and as a buffalo bull matures, the area of horn on its head develops into a large mass, known as a boss.

This is used to protect the head during the battles for dominance that they males frequently engage in. So female buffaloes have a “boss” down the middle of their horns, while males don’t.

Elephants are interesting in that the females have mammary glands between their front legs, distinctly resembling the breasts of human females.

Elephant females congregate in herds whereas the males, which are larger, are solitary, joining up and leaving groups at random. A subtle difference between the sexes is the shape of the head. The elephant male has a more rounded forehead than the female.

Images: Copyright Earth-Touch 2007

Collective suffocation method unique in bees?


Cyprian honeybees (Apis mellifera cypria) protect themselves against their archenemy, the Oriental hornet (Vespa orientalis), by smothering them to death, National Geographic News and LiveScience report.

This form of protection is unique in the insect world, and possibly in all animal species, LiveScience reported apidologist Gérard Arnold of the National Center of Scientific Research, France, as having said.

Previously, it was discovered that Asian honeybees could kill hornets by engulfing them in a ball of heat, a strategy known as “thermo balling”. But Oriental hornets are theoretically resistant to thermo-balling and can withstand high temperatures.

Scientists have now found that Cyprian honeybees can kill hornets by suffocating them instead, a strategy that has been dubbed “asphyxia-balling”.

Researchers explain that hornets breathe via small openings in their sides called spiracles, which are covered by structures known as tergites. The study of Cyprian honeybees reveals that bees mob the hornets and cover the spiracles.

Details of the study are published in the journal Current Biology.

PICTURE: Cyprian honeybees attack an Oriental hornet. Image: Courtesy Gérard Arnold

Dishing up the content ...

By Graeme Duanne, field crew

The day finally came when the dish was to go on the roof of the first mobile uplink vehicle. This is a loan dish, so it is a bit bigger than the model that we’ll end up with, but it works the same.

With André, Stuart, Barry and myself grunting and heaving, we carried the 60kg (132lb) unit down the fire escape at the Durban office and lifted it onto the roof of the Land Cruiser.

The vehicle was made for this sort of thing, and road tests showed that the extra bulk on the roof rack never even made a difference to speed or wind noise!

This vehicle will be used to track the arrival of whales on the southern tip of the African continent. We’ll spend time at Cape Agulhas at the southern tip of Africa, where the Indian Ocean and Atlantic Ocean meet, and move west towards Cape Town as time goes by.

With the dish controller and modem boxed up it should be relatively easy to “fling” this dish up and lock it to satellites, provided we have a clear view of the north sky.

We’ll see!

Image: Copyright Earth-Touch 2007

Venomous stonefish shelters in wreck

Stonefish are believed to be one of the most venomous of all fish species. The dorsal fin of this fish is extremely sharp, penetrating the skin with ease and releasing deadly venom. This toxin can kill a person in a matter of hours if not quickly attended to.

Stonefish are neither large nor is their bite vicious, but their danger comes with their camouflage; they cannot be easily spotted in the ocean.

See this dangerous fish in a shipwreck near Durban harbour, South Africa, in the Earth-Touch footage Wreck harbours deadly stonefish.

Image: Copyright Earth-Touch 2007

9.18.2007

Aaaahhh, at last some sharks!

By Graeme Duanne, field crew

It’s amazing what you’ll resort to when desperate! The ropey weather on our home coast in KwaZulu-Natal, South Africa, being as bad as it has, we’ve battled to find water days with the camera.

So with doubtful glances, Barry Skinstad and I headed out in a 15-knot wind to Eelskins, a dive spot south of Durban, to try and find some shark action. One look at the water out there was no encouragement – it was green and murky, with perhaps just 5m (16ft) visibility.

As I mentioned, desperation … We plunged overboard on the drift and waited. Before long we’d picked up the Limbatus gang, 20 or so blacktips that loomed in from the murk. They’d been socialising and had invited a few big duskies along for good measure.

At first this was a somewhat uncomfortable situation: bad visibility, lots of sharks, strong current and high wind; but after seeing the impeccable manners of the sharks, we decided to stay. While they did swim really close, they never once showed any obvious aggression. At times I thought I’d kicked Barry and on looking down I’d see a Blacktip glaring at me as if to say “Hey, what was that for?”

The result of this dive was some really nice footage shot in very bad conditions, but thanks to the sharks – we couldn’t have done it without them.

See the footage Graeme Duanne and Barry Skinstad shot in the Earth-Touch clip, Blackfin sharks at close range.

Image of blacktip shark: Copyright Earth-Touch 2007

Did you know? Zebra stripes

Every individual zebra has a matchless stripe pattern made up of black stripes on a white base.

Not only are they all different, but also the pattern of stripes on the left hand side differs from that on the right.


The distinctive pattern of each zebra, as well as scent, allows the mother to identify her foal in the first days after birth, even in a large herd.

A zebra has more capillaries bellow its black stripes, which are thought to aid heat regulation and keep the zebra cool under the hot African sun, as black absorbs heat better than white.

See these black and white grazers in a variety of Earth-Touch clips, including:

All images © Earth-Touch 2007

Male chimps use stolen fruit to entice females

PICTURE: A male chimpanzee steals a papaya to give to a member of the opposite sex. Image: Courtesy Dr Kimberley Hockings/PLoS ONE

A two-year study in the Republic of Guinea in West Africa has revealed that male chimpanzees use stolen fruit to entice females for mating, LiveScience, BBC News and Reuters reported.

The study, conducted in the village of Bissou, found that male chimps steal fruits such as papaya from nearby orchids and give it to females of reproductive age. Lead researcher Dr Kimberley Hockings argues the gesture appeals to females.

“It is unusual behaviour, as even though the major part of chimpanzees diets consists of plant foods, wild plant food sharing occurs infrequently,” says Hockings, a psychologist based at the University of Stirling in Scotland.

The study also revealed that those chimps that share their “forbidden fruits” engage in more “consort ships” with females and receive better grooming than those who do not share, including alpha males.

The study was published in the Public Library of Science’s journal, PLoS ONE.

Watch a video of a chimp stealing fruit and offering it to a female hosted by the BBC, or download videos from PLoS ONE.

9.17.2007

A wildlife photographer’s ways of seeing


By Graham Springer, field crew


The following are some of my own rambling musings on the subject of photography. Feel free to disagree with or deride them – after all, if we all had the same ideas, life would be very dull indeed!

Like all visual art mediums, photography is simply a vehicle for an artist to convey his or her perception of the world and a personal reality. A photograph is, in its purest form, an insight into the mind’s eye of the artist. Simply by framing a subject, by deciding what to include and what not to include within the border of the frame, we’re making and imposing our own perceptual judgements.

The actual act of making a photograph is simplicity itself. A camera is a simple thing to operate. In these digital days of fully automatic artificial intelligence, anyone can pick up a camera and make correctly exposed and sharply focused images.

Ironically it’s because of this that it’s becoming more difficult to create unique and engaging images.

Because the technical aspects of photography are being made simpler, images that jump out and grab us in this modern age have to have that “something extra”. This comes down to the creative insight of the photographer – in conjunction, of course, with the requisite technical acumen needed to realise this.

Scientists have tried, using complicated forecasting techniques and state-of-the-art equipment, to replicate some of famous American master photographer Ansel Adams’ images, but they haven’t been able to come close to evoking the sense of atmosphere that Adams managed to create 40 years ago – with what today would be considered obsolete equipment. It’s not about the camera!

Minor technical discrepancies aside, the digital medium is a double-edged sword in a creative sense. The ability to immediately access images is remarkably convenient and allows for on-the-spot evaluation and fine-tuning of experimental techniques. There is also no incremental cost so extensive experimentation is made more feasible. The advantages of this are obvious and can no doubt lead to some really creative work.

Working remotely, as we at Earth-Touch do, it can often take months to get developed film back, and by then I’ve forgotten how I shot something! The value of this ability to immediately evaluate is immeasurable. The flip side is that I now so often see people adopt a wild machine-gun approach.

Because there are no restrictions in terms of film and cost, the temptation, and all too often the reality, is to shoot wildly, hoping that the law of averages will hold fast and you’ll get a couple of workable images (which does often turn out to be the case).

Shooting on film, however, forces you to consider more carefully how you create images. This is crucial – I feel strongly that one must engage in an intellectually creative process if one’s images are to have any sort of consistent creative and narrative integrity.

Technical acumen is non-negotiable in the discipline of photography. The technical aspects of exposure, focus, etc, and familiarity with your equipment must be relegated to instinct. Thus all your attention can be directed at the creative aspect of making the images. How you choose to deploy the various technical options offered by your equipment is then entirely at your own discretion and can be used to most effectively enhance the creation of images.

This is especially so in the instantaneous arena of wildlife photography, where creative decisions must often be made in a split second if one is to capture those all too fleeting moments effectively.

In my mind, the most important skill a wildlife photographer needs to have is an understanding and anticipation of animal behaviour. Things often happen very quickly and you have to be proactive in your thinking, always trying to put yourself ahead of the action. In any event, you frequently have to make do with a less than optimal position. But then how you deal with this becomes part of the challenge. Often you have to work from a hide where you’re relegated to one (hopefully carefully chosen) position, and must make the most of it.

The more I work in and understand the natural world, the better my photographic realisation of it becomes.

Most often the direction of the light source will be dictated by the constraints of the scene, but wherever possible I try to avoid front-light of any kind. It flattens images and drops contrast which makes for one-dimensional and visually boring images.

When photographing a scene I always try to recognise and then capture interesting and unusual compositions; symmetry, asymmetry, abstract elements, partial forms. I constantly look for that unusual perspective. Sometimes just a suggestion of the subject is most telling. Less is so often more. I try to play with depth of field, or slow my shutter speed right down to blur motion – anything that will add some extraordinary visual dimension to an image.

By removing elements of visual information, we can force the viewer to engage with an image on a subconscious level, requiring more cerebral activity. When we’re presented with all the required information, very little neural activity is stimulated and it’s all too easy to glance at an image and move on.

Take the impressionist art genre – this style of art made, and still makes, a huge impact, partly for this very reason – it stimulates the imagination. This is also largely why good black and white images have such impact.

An important caveat here is to be very careful not to go too far with this element – to avoid doing something weird and wonderful purely for the sake of doing something different. Always honour the essence of the subject. Indeed, most times this means creating a true and untainted replication of a scene or subject.

There is an unfortunate misconception that the defining elements of a good wildlife photograph are expensive equipment and luck. Often good fortune does lend a gracious hand, and we’re lucky enough to be granted ample opportunity, but for the most part it’s a combination of skill, patience and sheer hard work.

It’s all about understanding light. It’s about understanding and anticipating animal behaviour – and then positioning yourself and reacting fast enough to capture the image. It’s about recognising interesting compositions and then capturing them creatively. It’s about being prepared to try something different, knowing that you may well wind up getting nothing at all.

But most of all, it’s about understanding and respecting the natural world and all its components. You must truly appreciate, understand and revere your subject matter before you can even attempt to capture its essence.

I try wherever possible to create interesting and creative images that have artistic photographic credibility, independent of subject matter. I try also, as much as one ever can, to capture the ineffable spirit of the wilderness in which I’m lucky enough to live.

The result, I hope, is delivering engaging images that convey my love for the African wilderness and that evoke some sense of the spirit of the place in those who see them.

Images © Graham Springer / Earth-Touch 2007

Did you know? Hoatzin bird

Hoatzin birds are large, unusual-looking birds, with long, feathered crests, that inhabit the forest canopies of South America.

The hoatzin – pronounced “wat-sin ” –
eats mainly leaves, which are ground up in its large crop, an extension of the oesophagus, where the cellulose from the plant matter is fermented by bacteria to produce sugars a similar digestive mechanism to that of the cow, except that it takes place in the crop and not in the stomach. This is a unique characteristic amongst birds and gives the hoatzin a strong, musky smell. The weight of its large crop also makes it a poor and ungainly flier.

Spot the hoatzin in the first-ever Earth-Touch clip from South America, Enchanted Ecuador forest.

Hoatzin picture: Courtesy Wikipedia