Po'ouli (2004)

PHOTO: Paul E. Baker/Wikimedia Commons

A native of Maui, Hawaii, the Po'ouli, or Black-faced Honeycreeper, was discovered in the 1970s. The birds inhabited the south-western slope of Haleakala volcano. But the population declined and by 1997 there were only three known Po'ouli left. Efforts to mate the remaining birds failed and the species was formally declared extinct seven years later.

Cause of extinction:Habitat loss, along with disease, predators and a decline in its food source — native tree snails — are all seen as reasons for the bird's demise.