Species:

Pomarine Jaeger (Stercorarius pomarinus)

Hazel Grouse (Tetrastes bonasia)

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Length (cm):
46-51
35-37
Wingspan (cm):
125-138
48-54
Weight (gram):
600-900
310-490
Size group:
Crow-size
Crow-size
Main Texts:
Appearance:

Pale and dark morphs. Often difficult to distinguish from Arctic Skua. Adults with broad, spoon-shaped streamers. These are moulted twice a year, so adults lacking these are not uncommon. The dark cap reaches around the bill base and down to the chin. Breast band in pale morph is generally broader and more pronounced than in Arctic Skua, but in some males it is lacking altogether. Leaves an overall more robust and powerful impression than Arctic. Wings are broader than the distance from trailing wing-edge to tip of tail (streamers excluded), while the hand seems shorter. The light patches at the base of the primaries are more obvious, and many young birds shows a characteristic double patch, formed by additional white base of greater primary coverts (like Lesser Spotted Eagle). Rump and vent of juveniles usually boldly barred, in contrast to unbarred back and belly (visible even in dark morph). Streamers never pointed (in any plumage). Flight pattern straighter, and more determined than in Arctic Skua.

Sound:

Short "kea" or "ke", and various mewing calls, usually deeper pitched than Arctic Skua. Also a characteristic, laughing and vibrating "kayayayayaya", heard mostly on breeding ground.

Alarm/flight call:

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See sound file


Distribution:

Wikipedia: map (se also Xeno-canto below)

Ecology:

Birdlife ecology

Links:

Observation.org Latest observations

Video IBC

Image search Flickr NB! May give other species

Sound search at Xeno-canto

Featherbase

CC

CC-photo:loarie, Licence,Link.

CC-photo:jerryoldenettel, Licence,Link.

Sounds:CC. http://www.xeno-canto.org .Recorded by Andrew Spencer.

Appearance:

Easily overlooked, secretive grouse. Small and compact, with small head and rounded body. Upper parts grey, wings speckled in brown. Tail grey with broad black terminal band. Male with short crest, contrasting black throat patch and generally brighter coloured than female.

Sound:

Song an extremely high pitched whistle; "piuuuuuuuiiii pju pju pju". Start-note typically sustained, first descending then ascending and descending again. Often followed by three short conclusive "pju, pju pju". Warning call of female a bubbling thrill.

Male song:

Error loading Flash for sound!
See sound file


Distribution:

Wikipedia: map (se also Xeno-canto below)

Ecology:

Birdlife ecology

Links:

Observation.org Latest observations

Video IBC

Image search Flickr NB! May give other species

Sound search at Xeno-canto

Featherbase

CC

CC-photo:ressaure, Licence,Link,

CC-photo:mattisj, Licence,Link.

CC-photo:pilot_micha, Licence,Link.

Similar species (sound):
Silhouette Group:
Gull-like
Silhouette
Grouse-like
Silhouette
Several different images of the species
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Several different sounds of the species
Error loading Flash for sound!
See sound file
Error loading Flash for sound!
See sound file