Hawaiian Goose, or Nene, Branta sandvicensis, one of the endemic birds of the Hawaiian Islands, this one in the Haleakala National Park on Maui. It is the World’s most rare goose. It was once numerous in Hawaii, but after pigs, boar, mongooses, cats, dogs and rats were introduced the population fell to an all-time low in 1952, with only 30 birds left in the world. They were rounded up and then successfully bred in captivity and then reintroduced on several of the Hawaiian islands. A heroic effort in captive breeding, spearheded by Peter Scott at Slimbridge Wildfowl Reserve in the UK, brought it back from the brink of extinction in the 1950s, one of the first in a sequence of such monumental wildlife conservation efforts over the decades since. Now the wild population of the Nene in Hawaii is 2500 birds, of which 650 on Maui and 250 of them in the Haleakala National Park.