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, gerfalcon
a very large rare falcon, Falco rusticolus, of northern and arctic regions: often used for hunting



(Faleo gyrfalco), a bird of the family Falconidae, order Falconiformes. Body length, 50-60 cm. Male’s weight, up to 1.5 kg; female’s, up to 2 kg. The plumage is gray, or white with gray markings. The gyrfalcon is distributed in Northern Europe, Asia, and North America. It lives on rocky seacoasts and in forest tundra. Gyrfalcon mates stay together for many years. They nest on rocks, steep shores, or high trees. There are three to five brownish eggs with red spots in each clutch, which are incubated mainly by the female for 28-29 days. The young leave the nest at about two months. Gyrfalcons feed mainly on birds that they capture on the wing; more rarely they catch lemmings, voles, and hares. Gyrfalcons were highly prized as hunting birds in falconry. They are scarce everywhere and need to be protected.

References in periodicals archive ?
In our study, concurrent infection was observed in peregrine and gyr falcons, where C kulzeri and C neofalconis were identified.
Avian malaria in imported gyr falcons in United Arab Emirates.
The plumage colour of the gyr falcon is extremely variable, ranging from nearly pure white to jet black.
Except for one gyr falcon that was sent home with the tube in place, the tubes in these birds were removed at the time of discharge to prevent manipulation by the falconers.
Eight species of raptors were represented and 1 hybrid species: 4 northern goshawks (Accipiter gentilis), 3 hybrid gyr x saker falcons (Falco rusticolus x Falco cherrug), 3 Harris hawks (Parabuteo uncinatus), 2 peregrine falcons (Falco peregrinus), 2 gyr falcons, 1 saker falcon, 1 golden eagle (Aquila chrysaetos), 1 white-tailed sea-eagle (Haliaeetus albicilla), and 1 red-tailed hawk (Buteo jamaicensis).
1-kg, captive-bred, male gyr falcon (Falco rusticolus) was presented for left leg paresis of 48 hours' duration.
Normal haematological values in gyr falcons (Falco rusticolus).
Ask a birdwatcher which bird he would most like to see and you can bet gyr falcon will be high on many lists.
An ermine executioner swept across the bay - it was a magnificent white gyr falcon.
The objective of the current study was to establish temperature-corrected reference intervals for arterial blood gas parameters and to compare them with temperature-corrected venous blood gas parameters in healthy gyr falcons (Falco rusticolus) maintained under isoflurane anaesthesia.
You have personalities among falcons too; the female Gyr Falcons, for instance, are very polite and respond well to their handlers, but the Shaheen Peregrine Falcons tend to get distracted.
In a report on gyr falcons, May-Grunwald-Giemsa and Rapid Romanowsky stains did not adequately stain eosinophil granules, which appeared as colorless, irregular cytoplasmic vacuoles; however, the granules were appropriately stained with modified Wright-Giemsa stain.