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Kelp Goose

From Opus

Male, nominatePhoto by Sylvester_bPunihuil, Southern Chile, March 2007
Male, nominate
Photo by Sylvester_b
Punihuil, Southern Chile, March 2007
Chloephaga hybrida

Contents

[edit] Identification

Female subspecies malvinarumPhoto by jmorlan Carcass Island, Falkland Islands, 2 March 2018
Female subspecies malvinarum
Photo by jmorlan
Carcass Island, Falkland Islands, 2 March 2018

There is substantial sexual dimorphism in this species, and is a rare case in which the female is much more dramatically marked than the male.
Male: Almost pure white with a few scattered darker feathers. Black bill and yellow feet.
Female: Dark with white barred underparts; only the rear of the bird is white. Pink bill, yellow feet. Wings have black primaries and green greater coverts.
Immature male: Similar to adult male but with tertials blackish[2].
Juvenile:Similar to adult female but lacks green iridescence in greater coverts.

[edit] Similar species

Yellow legs separate the male from the most similar Sheld-Geese. Female is superficially similar to Upland Goose but blacker head and upperside in greater contrast to white vent should make even distant observations obvious.

[edit] Distribution

Coast in southern half of Chile, southern Argentina, Tierra del Fuego, and the Falkland Islands.

[edit] Taxonomy

Immature male subspecies hybridaPhoto by: njlarsen North of Punta Arenas, Chile, December 2009
Immature male subspecies hybrida
Photo by: njlarsen
North of Punta Arenas, Chile, December 2009

Two subspecies are recognized:[1]

  • C. h. hybrida: Smaller.
  • C. h. malvinarum:

[edit] Habitat

Rocky coasts.

[edit] Behaviour

Usually found in pairs.

[edit] Breeding

The 2-7 eggs hidden in long grass.

[edit] Diet

Their diet consists mostly of kelp, for which they migrate along the coast of South America. They also take filamentous algae (Enteromorpha), sea lettuce (Ulva) and leafy algae (Porphyra), found on tidal rocks. They also feed on green grasses on their breeding grounds and berries during winter. [3]

[edit] References

  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2017. The eBird/Clements checklist of birds of the world: v2017, with updates to August 2017. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Birdforum member, personal observations
  3. Del Hoyo, J, A Elliot, and J Sargatal, eds. 1992. Handbook of the Birds of the World. Volume 1: Ostrich to Ducks. Barcelona: Lynx Edicions. ISBN 978-8487334108
  4. Jaramillo, A. 2003. Birds of Chile. Princeton & Oxford: Princeton Univ. Press. ISBN:9780691117409
  5. Wikipedia

[edit] External Links

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