Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. 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.
Animal