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Vinony
Category

Onychoprion

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Sooty Tern
species of bird
Bridled Tern
species of bird
Aleutian Tern
species of bird
Spectacled Tern
species of bird
Onychoprion
Onychoprion is a genus of four species of terns in the family Laridae. The genus name is from Ancient Greek , "claw" or "nail", and , "saw". As a group, they have been variously called "brown-winged terns" or "brown-backed terns", though only one species is actually brown; the other three are dark grey or black.