Forster's tern (Sterna forsteri) is named after the naturalist Johann Reinhold Forster (1729-1798) who made contributions to the early ornithology of Europe and North America. He is best known as the naturalist on James Cook's second Pacific voyage. This bird breeds inland in North America and winters south to the Caribbean and northern Central America. It is mostly white, with a pale grey back and wings and a black cap. However, in winter, Forster’s tern has a black mark behind each eye instead of a black cap.