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Parasitic Jaeger

From Opus

(Redirected from Arctic Skua)

Alternative names: Arctic Skua, Parasitic Skua

Photo by IanF Cleveland, UK
Photo by IanF
Cleveland, UK
Stercorarius parasiticus

Contents

[edit] Identification

41-48 cm (including tail projection)

  • Elongated central tail feathers (just noticeable in juveniles).
  • White wing flash

Dark Phase and Young are brown apart from the whitish patch near wing tip.

Light Phase have creamy-white underparts, cheeks and neck (barred brown in winter) and a dark cap.

Intermediates have variable amounts of light and dark plumage: some are brown with dark cap, others brown with yellow neck-ring.

[edit] Similar Species

Pomarine Skua, Long-tailed Skua.

[edit] Distribution

Alaska, Canada, Greenland, Iceland, Scandinavia, and northern Russia. Winters at sea in southern oceans.

[edit] Taxonomy

Monotypic[1]

[edit] Habitat

Breeds on dry tundra, higher fells and islands. Otherwise pelagic but close to land.

[edit] Behaviour

Bird Forum thread for jizz and behaviour-based ID tips

[edit] Flight

Rather hawk-like and bouyant. Chases other birds.

[edit] Breeding

Breeds in loose colonies
Up to four olive-brown eggs are laid on the ground.

[edit] Diet

Diet includes lemmings and other rodents. Robs other birds of their fish catch.

[edit] Vocalisation


Listen in an external program

[edit] References

  1. Clements, JF. 2009. The Clements Checklist of Birds of the World. 6th ed., with updates to December 2009. Ithaca: Cornell Univ. Press. ISBN 978-0801445019.
  2. Wikipedia
  3. Answers.com
  4. Birdwatchers Pocket Guide ISBN 1-85732-804-3
  5. Collins Pocket Guide to British Birds 1966
  6. Collins Field Guid 5th Edition

[edit] External Links

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