Friday, August 25, 2006

Charismatic island dwellers saved from extinction


Conservation action saved 16 bird species from extinction between 1994 and 2004. Although they represent just 1.3% of the world’s threatened birds, these successes demonstrate that, given political will and resources, we have the knowledge and tools to turn back the tide of extinction.
In their paper How many bird extinctions have we prevented? (Oryx, July 2006), BirdLife authors Stuart Butchart, Alison Stattersfield and Nigel Collar explain how they identified these 16 cases: the first time anyone has attempted to quantify the results of global conservation action in this way for any group of organisms.
The majority had populations of fewer than 100 birds in 1994, with only four known breeding pairs of Chatham Island Taiko Pterodroma magentae, just four breeding female Norfolk Island Green Parrots Cyanoramphus cookie, and five pairs of Mauritius Parakeet Psittacula eques (three of which had bred without success).
Conservation actions for 11 species were implemented through a mixture of governments and non-governmental organisations, with governments alone responsible for the rest. BirdLife International contributed to action for seven species.
“By 2004 some species had undergone very significant population growth,” Stuart Butchart explained. “Norfolk Island Green Parrot increased almost ten-fold from 32–37 individuals to 200–300 individuals, and Mauritius Parakeet ten-fold from five pairs to 55 pairs.”
However, these 16 species are not a representative sample of the world’s threatened bird species, since 10 are confined to islands, where small-scale action can be more effective, while more than half of all threatened birds are continental, and often affected by broader-scale habitat loss and degradation.
Three-quarters of the species could also be considered “charismatic” (parrots, raptors, pigeons, large waterbirds etc.) while just 48% of all Critically Endangered birds would qualify. Butchart suspects that charismatic species may capture conservationists’ attention more easily, and are certainly easier to raise funds for, and to change public opinion about.

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