White-winged Tern Chlidonias leucopterus
Gaivina-de-asa-branca
2010-10-15
Cabo da Praia, Terceira
© Kari Haataja, Finland
Birding Azores
Compare head markings and wing moult with the other White-wing Tern in the area (see photos from 2010-10-10 and 2010-10-15).

  Enlarge picture.