Banded Roseate Terns (Sterna dougallii) trapped on nests in the Azores illustrate that, during the nonbreeding season, birds from the Azores are found on the coast of Africa in groups of Roseate Terns from northern Europe and on the coast of South America with birds from the northeastern U.S. and the Caribbean. One Roseate Tern, probably originally banded on a nest in a western Atlantic colony, suggests the possibility of gene flow between these colonies and the Azores.