Description: The black-billed gull is a white bird with black wing tips and, as the name suggests, a black bill. It lives in pairs along the shores of New Zealand's lake margins and riverbeds. This species is often preyed upon by the non-native animals of New Zealand such as dogs, cats and ferrets. Their numbers have declined rapidly in the past three decades and they are now the world's most endangered gull.

IUCN Status: Endangered
Major Threat: Predation by non-native species
Habitat: Lake margins, riverbeds and inland pastures
Location: Shores of New Zealand
Diet: Mainly fish and crustaceans