Birds of Peru

    CHARADRIIFORMES: Stercorariidae (Skuas)  
Genus: Stercorarius (5 species, 7 worldwide)

Genus Stercorarius includes jaegers and skuas, large gull-like seabirds that often steal food from gulls.


Chilean Skua
Chilean Skua (Stercorarius chilensis)
Ushuaia, Argentina
  Note black cap and brownish color compared to South Polar Skua.
   
Photograph by dfaulder     Copyright and usage info


Long-tailed Jaeger
Long-tailed Jaeger (Stercorarius longicaudus pallescens)
Nome, Alaska,  
   
Photograph by Mick Thompson/Eastside Audubon     Copyright and usage info

Long-tailed Jaeger
Long-tailed Jaeger (Stercorarius longicaudus pallescens) Immature
United States
  Immature Long-tailed Jaegers are more grey than other immatures (Birds of Peru).
   
Photograph by Tim Lenz     Copyright and usage info

Has longest central tail feathers (longer than length of tail) of any Jaeger.

South Polar Skua
South Polar Skua (Stercorarius maccormicki)
  Pale morph. Image credit: Henry Kaiser, NSF
   
Photograph by U.S. Government employee (see below)     Copyright and usage info

South Polar Skua
South Polar Skua (Stercorarius maccormicki)
Massachusetts,
  Dark morph. Also note more white on wings than on those of jaegers.
   
Photograph by François Grenon   © All Rights Reserved.

Comes in pale and dark morph. Migrates between the Arctic and Antarctic, so could turn up anywhere.

Parasitic Jaeger
Parasitic Jaeger (Stercorarius parasiticus)
Germany
  Light morph.
   
Photograph by Andreas Trepte     Copyright and usage info

Parasitic Jaeger
Parasitic Jaeger (Stercorarius parasiticus)
Barrows, Alaska,
  Dark morph.
   
Photograph by budgora     Copyright and usage info


Pomarine Jaeger
Pomarine Jaeger (Stercorarius pomarinus)
Barrows, Alaska,  
   
Photograph by budgora     Copyright and usage info

Largest Jaeger. Black cap extends below bill (Birds of Peru). There is also a dark brown morph.


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