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Sooty Tern Onychoprion fuscatus

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Appearance

Distinguishing Characteristics

43 cm. 180 g. Bill black. Crown black. Forehead white. Sides of head white. A black mask joins with the crown. Upperparts black. Throat and chest white. Belly and flanks grayish-white. Feathers that cover underwings white. Wings black. Tail forked, black with white border. Legs black. Non-breeding adult (September-January): Nape grayish. Breeding adult (January-September): Nape black. Upperparts deep black. Males and females are similar. Juveniles have the head, chest and upperparts sooty blackish brown, scaled with white on back; feathers that cover underwings white.

Similar Species

Onychoprion anaethetus has darker cap, tail longer and the collar on nape is narrower.

Detailed Description

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Recommended Citation

Sooty Tern (Onychoprion fuscatus), In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. retrieved from Neotropical Birds Online: https://neotropical.birds.cornell.edu/Species-Account/nb/species/sooter1