Aleutian tern

The Aleutian tern (Onychoprion aleuticus, formerly Sterna aleutica - see Bridge et al., 2005) is a seabird of the tern family, Sternidae.
This species breeds in colonies on coasts and islands in Alaska and easternmost Siberia. It is strongly migratory, wintering off Indonesia and Malaysia. Large numbers appear off China during passage periods.