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'Extinction' Isn't Always the End of the Story

Posted on: Sunday, 6 November 2005, 21:00 CST

By ED STODDARD

THE rediscovery of several species thought to be extinct has rekindled

hope among conservationists that there may be more out there hanging on

to dear life, says ED STODDARD

SCIENTISTS beware: Don't count your extinct bird species because one of

them may hatch. Several supposedly extinct birds have recently been

"rediscovered", raising hopes that others not seen for ages may still be

taking to the skies.

"The real message of rediscoveries is that we didn't look hard enough

in the first place," said Nigel Collar of UK-based conservation group

BirdLife International.

"We think we've explored the planet when we haven't. We have this

assumption that we know it all but we don't," he said.

The most recent reported rediscovery that has ornithologists in a flap

was that of the ivory-billed woodpecker, believed extinct for 60 years

until sightings in a remote part of the US state of Arkansas last year.

The authenticity of those sightings has already been questioned by some

scientists but the evidence presented in other cases has been beyond

dispute.

"Rediscoveries" fall into two categories, the first being birds that

were written off as extinct but subsequently found.

The second includes birds not seen for decades - often because conflict

made their home range inaccessible - but that were not necessarily

considered extinct.

One of the most startling avian "resurrections" was the New Zealand

storm petrel, which was positively sighted in 2003.

Believed by many to be extinct, it was previously only known from

fossil material and three 19th century specimens. A group of bird

watchers saw the black-and-white sea birds off New Zealand's North Island

in January 2003.

Also in 2003, the long-legged warbler - not seen by experts since 1894

- was found alive in the mountains of Fiji.

Last year, the rusty-throated wren-babbler - not seen for almost 60

years - was spotted in India's Himalayan mountains.

For some experts, the "Holy Grail" of lost birds has been hoisted with

the rediscovery of the ivory-billed woodpecker, a large bird with

striking looks that was believed to have fallen victim to the logging

industry.

"The ivory-billed woodpecker was the classic ... people really thought

it was gone," said Chris Hails, global program director with conservation

group WWF International. Despite the new finds, BirdLife says the overall

situation of the world's birds is worsening.

In a recent report, it said more than a fifth of the planet's bird

species faced extinction as humans ventured further into their habitats

and introduced alien predators.

Sometimes, the absence of humans can be a lifesaver. The southwestern

African country of Angola, which is emerging from three decades of civil

war and is best known for its oil and diamonds, is proving to be rich in

"lost birds".

South African ornithologist Ian Sinclair has been to Angola four times

since war ended in 2002 and has found 18 endemic species not been seen

and identified by experts for decades.

"We discovered that civil war, while obviously bad for people, was good

for the habitat and the environment," Sinclair told Reuters. "All of

these huge coffee plantations were abandoned ... A lot more habitat is

available as a result."

A six-day expedition earlier this year yielded positive sightings of

the orange-breasted bush-shrike and the white-headed robin-chat - not

seen by scientists since 1957.

The group also spotted a single pair of black-tailed or slender- tailed

cisticolas. These are only found in Angola and neighbouring Democratic

Republic of Congo and had not been seen in the wild since 1972.

Swiestra's francolin - similar to a grouse or partridge - is the one

Angolan endemic that Sinclair has yet to rediscover. But he hopes to see

it on a trip in September to the bird's home range in the mountains of

southcentral Angola.

"I'll find them. There's nobody up there hunting them and the habitat

is intact, so the birds are there," he said.

Scientists say more "extinct" species may also turn up.

Not far from Angola, BirdLife's Collar thinks a white-chested

tinkerbird might be found. "It's only known from a single specimen

collected in September 1964 in northwestern Zambia. So it's been off the

map for 40 years," he said.

Also being sought is the pink-headed duck of India and Myanmar. There

have been no reliable sightings since the late 1940s but there are

reports of rural folk hunting it in Myanmar.

"It shows some things can hang in there and with the right effort you

can make the future for some species more secure," said WWF's Hails.

"This is why conservation agencies work."

Still, there are clearly some no-hopers, such as the famed dodo of

Mauritius, a large flightless bird that died out long ago because of

human activities such as overhunting.

"There is no chance of a dodo turning up," said Collar.

Source: New Straits Times

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