Uncommon to fairly common summer migrant from winter grounds in Africa. Like Black Tern, feeds by picking from surface, not splash-diving like typical terns. Breeding adult has distinctive, dark smoky gray body and contrasting white cheeks (can look like broad white "whiskers" in flight). Nonbreeding plumages are pale silvery gray overall; juvenile has dark-checkered back. Note rather stout bill; compare to Common and Arctic Terns.