The Alaotra grebe, also called the rusty grebe, had been highly vulnerable as it was found only in Lake Alaotra, eastern Madagascar, according to the Swiss-based International Union for Conservation of Nature (IUCN), which compiles the Red List of endangered species.
The grebe was wiped out by habitat destruction, by the introduction of a carnivorous fish called the snakehead murrel and by nylon gill-nets which accidentally caught and drowned many birds.
"No hope now remains for this species. It is another example of how human actions can have unforeseen consequences," said Leon Bennun, director of science at BirdLife International.
