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South Polar Skua


South Polar Skua
Photo Information
Copyright: Olgierd Rozycki (rolesox) Silver Note Writer [C: 0 W: 0 N: 173] (1940)
Genre: Animals
Medium: Color
Date Taken: 1994-02
Categories: Birds
Photo Version: Original Version
Date Submitted: 2014-03-25 14:19
Viewed: 2972
Points: 2
[Note Guidelines] Photographer's Note
The South Polar Skua (Stercorarius maccormicki) on the seashore at the Admiralty Bay, King George Island. Picture taken during the XVIIth Polish Antarctic Expedition.
The South Polar Skua is a large seabird in the skua family Stercorariidae. An older name for the bird is MacCormick’s Skua, after explorer and naval surgeon Robert McCormick, who first collected the type specimen. This species and the other large southern hemisphere skuas, together with Great Skua, are sometimes placed in a separate genus Catharacta.
The South Polar Skua is a large bird (though small compared to other skuas sometimes placed in Catharacta) that measures approximately 53 centimetres (21 in) in length. Adults are greyish brown above, and have a whitish (pale morph) or straw-brown (intermediate morph) head and underparts, and the contrast between head and body makes it easy to separate from similar species with good views. Juveniles and adult dark morphs are harder to distinguish from their relatives, and more subjective or difficult-to-observe criteria, such as the colder brown plumage and blue bill base, must be used.
It breeds on Antarctic coasts, usually laying two eggs in November and December. It is a migrant, wintering at sea in the Pacific, Indian and Atlantic Oceans. In the eastern North Atlantic it is replaced by the Great Skua. South Polar Skuas have been seen at the actual South Pole itself. Megalestris Hill, on Petermann Island in the Wilhelm Archipelago of Antarctica, is named after an obsolete generic name for the South Polar Skua.
PL – wydrzyk antarktyczny to duży ptak morski z rodziny wydrzyków (Stercorariidae). Za-siedla morza w okolicach północnej Grenlandii, północno-zachodniej Ameryki Północnej oraz wokół Antarktydy. Gatunek pospolity w rejonie Zatoki Admiralicji. W większości zasiedla morza, gniazduje na nieośnieżonych terenach, czasem blisko kolonii pingwinów. Dieta tych ptaków składa się z ryb, głównie tzw. śledzik antarktyczny (Pleurogramma antarctica, En. Antarctic silverfish) i kryla (Euphausia superba, En. Antarctic krill). Polują również na jaja i młode pingwiny. Populacja oszacowana na 5000-8000 par.
Mierzy około 53 cm i osiąga masę ciała 0,9-1,6 kg. Czarny, średnio długi i haczykowato zagięty na końcu dziób. Spód ciała, głowa i pierś piaskowobrązowe. Ciemnobrązowe, począt-kowo jaśniejsze skrzydła, szerokie i zaokrąglone. Ciemnoszare nogi.


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Critiques [Translate]

Interesting bird in very difficult light and environmental conditions. Good details of the plumage.
best regards
Pierre

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