The Aleutian Islands are home to an abundance of large bird colonies; more than 240 bird species inhabit in Alaska's Aleutian Archipelago. Large seabird colonies are present on islands like Buldir Island, which has 21 breeding seabird species, including the Bering Sea-endemic red-legged kittiwake. Large seabird colonies are also present on Kiska Island, Gareloi Island, Semisopochnoi Island, Bogoslof Island, and several others.