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South Polar Skua Stercorarius maccormicki

Sections

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

Information needed. Contribute

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