Great Bustard (Otis tarda) -> Hen Harrier (Otis tarda) - BirdID's Bird Guide - Nord University

Species:

Great Bustard (Otis tarda)

Hen Harrier (Circus cyaneus)

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Little Bustard

Pallid Harrier

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Collared Dove

Marsh Harrier

Length (cm):

75-105

44-52

Wingspan (cm):

190-260

100-120

Weight (gram):

3800-8500

300-600

Size group:

Bigger than a crow

Crow-size

Main Texts:

Appearance:

Heaviest bird in area. Stocky with well developed chest. Male 50% larger than female. Mostly unmistakable, and differs from all other bustards in area in all plumages by pale, grey head (yellowish grey in female), clearly paler than the rufous upperparts and lower neck. Male with thick neck, rufous chest and long moustache feathers. Female with more slender neck and duller colours. In flight the big white wing-patch is conspicuous. Base of hand pale with smooth transition to dark tips. Secondaries black. When displaying the male raises wings and body feathers to a "foam-bath" posture with head held low, like a white ball of feathers. Flight heavy but majestic. Shy and alert bird.

Sound:

Mostly silent, especially away from breeding ground. Display call a short deep, hollow thud "omp", using resonating gular pouch. Most heard is a nasal grunt used in various types of excitement. Sometimes given in a flatulent series.

Excitement call:

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:cruzperezmanuel, Licence,Link.

CC-photo:Viskens Michel, Licence,Link.

CC-photo:Paul Dirksen, Licence,Link.

CC-photo:Sergey Yeliseev, Licence,Link.

CC-photo:Cora de Groot en Ruud Versijde, Licence,Link.

Appearance:

In all plumages: Glides with wings raised in shallow V. Shows 5 primaries. This makes the wing tip broader than in Pallid- and Montague's Harriers, and the wings seems shorter. (Note that moulting individuals may show only 4 primaries). Male; grey with black primaries, white rump and underparts, and broad black trailing edge to underwing. Note that subadult males may show partly black primaries like Pallid. Female; brown with white rump, barred tail and streaked underparts.

Sound:

Mostly heard at breeding ground. Calls with quite soft series of "ke-ke-ke-ke". Also a wailing, squealing whistle, with emphasized first syllable.

Contact call: