The nene is the world's rarest goose. It is believed that it was once common, with approximately 25,000 Hawaiian geese living in Hawai?i when Captain James Cook arrived in 1778. Hunting and introduced predators, such as small Asian mongooses, pigs, and cats, reduced the population to 30 birds by 1952. The species breeds well in captivity, and has been successfully re-introduced; in 2004, it was estimated that there were 800 birds in the wild.
From album: Nature reserves in Hawaii