The Black-billed Gull (Chroicocephalus bulleri) is a species of gull in the Laridae family. It is endemic to New Zealand. As is the case with many gulls, it has traditionally been placed in the genus Larus, but is now considered to be the genus Chroicocephalus.
Its natural habitats are rivers, freshwater lakes, freshwater marshes, sandy shores, pastureland, and urban areas. It is threatened by habitat loss.