South Polar Skua Stercorarius maccormicki

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Appearance

Distinguishing Characteristics

43 cm. 1,150 g. Variable plumage. Bill black. Wings dark gray; outer flight feathers with white base. Legs black. Clear plumage: Head and nape pale gray. Upperparts brown, white edgings and streaks. Underparts pale gray, flanks with paler areas. Dark plumage: Plumage dark brown uniform. A golden band on nape. Intermediate plumage (May-June): Plumage similar to dark, but slightly more clear and streaked. Males and females differ in size, females are larger. Juveniles have dark gray plumage; paler scalloped on face and some wing feathers, more paler on belly. Reach reproductive maturity at 6 years of age.

Similar Species

Pomarine Jaeger (Stercorarius pomarinus) is bulkier, broad wings and shorter tail.

Detailed Description

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Recommended Citation

South Polar Skua (Stercorarius maccormicki), 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/sopsku1