Royal Tern (Thalasseus maximus) アメリカオオアジサシ
Royal Tern is native to the coasts of the Americas. They are similar to the Elegant Tern which is a little smaller with a longer bill. During breeding season, they have a full black cap. This one is looking a little scruffy. California 2017
Royal Tern taking off in Palo Alto. California 2017