Aleutian Tern

Aleutian Tern is a migratory bird living in the subarctic region of the globe most of the year, and is frequently associated with the Arctic tern, which it closely resembles. the Aleutian tern may be distinguished by its white forehead, though juvenile Arctic terns also have white foreheads (Wikipedia, general species account). The species is a migratory bird living in the subarctic region of the globe most of the year. (Wikipedia, general species account).

If its winter migratory range was completely unknown until the late 1980s. However, a phylogenetic analysis found that the species in the Onychoprion clade, which includes O. aleuticus, O. fuscatus (sooty tern), and O. anaethetus (bridled tern), are related only distantly to the "typical" terns retained in a much-restricted Sterna. Aleutian terns also have a call that is similar to call of red-necked phalarope (Phalaropus lobatus), which is a short, sharp "chit", possibly uttered during social contact. (Wikipedia, general species account).