Tern sea terns have light grey or white body plumage as adults, with a black cap to the head. The legs and bill are various combinations of red, orange, yellow, or black depending on species. The pale plumage is conspicuous from a distance at sea, and may attract other birds to a good feeding area for these fish-eating species. When seen against the sky, the white underparts also help to hide the hunting bird from its intended prey. The Inca tern has mainly dark plumage, and three species that mainly eat insects, the black tern, white-winged tern, and black-bellied tern, have
Roseate tern species is global warming, creating an alteration of vertical profile distribution for its food source fishes. The roseate tern is one of the species to which the "Agreement on the Conservation of African-Eurasian Migratory Waterbirds" (AEWA) applies. The Canadian Wildlife Service lists the roseate tern as Threatened. The U.S. Department of Interior lists the northeastern population as Endangered and the Caribbean population as Threatened. Roseate tern The roseate tern ("Sterna dougallii") is a tern in the family Laridae. The genus name "Sterna" is derived from Old English "stearn", "tern", and the specific "dougallii" refers to Scottish physician and collector Dr