Newsletter / Blog
2012-11-16 The rate of population decline of resident vultures in India and Nepal has slowed, but populations remain low and vulnerable
Populations of three Asian vulture species (White-rumped Vulture,
Long-billed Vulture, and Slender-billed Vulture) have declined by more
than 99% in South Asia since the early 1990s due to use of veterinary
drug diclofenac, prompting BirdLife to classify their status as
Critically Endangered. The governments of India, Nepal and Pakistan
banned veterinary use of the painkiller diclofenac in 2006 because of
its lethal effects on vultures that feed on the carcasses of cattle and
buffaloes that had been treated with the drug shortly before they died.
This initiative was essential for protecting the region’s endangered
vultures but until now the effectiveness of this ban at reversing the
vulture declines is unknown.
Good news for vultures?
In a new study in the science journal, PLoS ONE, researchers report
the results of long-term monitoring of vulture numbers from surveys
across India and Nepal. The latest surveys show that for both India and
Nepal and for all three critically endangered species that vulture
numbers have remained stable in the last few years. Prior to the ban on
veterinary diclofenac the vulture population was decreasing at a rate of
up to 40% a year. While the stabilisation in vulture numbers is
encouraging only small numbers of the birds remain and they are still
vulnerable.
Surveys for vultures were undertaken across more than fifteen
thousand kilometres of roads in western, central and eastern states of
India and across one thousand kilometres of roads in the lowland regions
of Nepal, following the same routes and methodologies of earlier
surveys in both countries. Surveys were undertaken by the Bombay Natural
History Society (BNHS) in India and Bird Conservation Nepal (BCN) in
the lowland regions of Nepal.
In India:
The study’s lead author, Dr Vibhu Prakash from BNHS (BirdLife in
India) commented: “The slowing of the decline in vulture numbers across
India for all three Critically Endangered species is the first sign that
the government’s ban on veterinary diclofenac is having its desired
impact. Continued efforts is still required to protect the remaining
small populations including halting the illegal use of human forms of
the drug in the veterinary sector.”
Taken in India during the 1980s, when White-rumped Vultures were very common (Goutam Narayan/BNHS)
In Nepal:
One of the studies authors, Khadananda Paudel from BCN (BirdLife in
Nepal) commented: “The slowing of the decline in vulture numbers across
Nepal and India is the first sign that the government’s ban on
veterinary diclofenac and local initiatives to prevent the use of
diclofenac within vulture safe zones is having its desired impact.
However we need to maintain the strength of this ban and ensure that the
whole Nepal can become a vulture safe area.”
Co-author Dr Richard Cuthbert from the RSPB (BirdLife in the UK)
said: “The stabilisation in numbers of these three Critically Endangered
vulture species in Nepal and India is really encouraging as previously
populations were nearly halving in number every year. A lot of hard work
still remains to ensure the small surviving populations can now begin
to recover across South Asia and that other toxic veterinary drugs do
not cause similar impacts to diclofenac.”
Efforts to reverse the decline in vulture populations are being
coordinated by a consortium of national conservation organisations and
multi-national vulture experts. This initiative, Saving Asia’s Vultures from Extinction
(SAVE), was launched in 2011 to help coordinate research, advocacy and
implementation of the actions needed to prevent these birds from
disappearing for ever. The second annual SAVE meeting was held in
Kathmandu on the 5-6 November 2012 and included representatives from
India, Nepal, Bangladesh and Pakistan. |