Many birds come to the Arctic in the summer to live and breed but not all of them live here year round. Ptarmigan, snow bunting, and snowy owls are some of the Arctic birds that live here year round. They are called snowy owls because their coloring is almost pure white when they are full grown. The feet of snowy owls are covered with feathers and have extra thick pads. Snowy owls live on the tundra. They stay in the Arctic during the winter unless their food sources are scarce. If they leave the arctic in the winter they overwinter in northern Greenland, the Canadian islands, northern Eurasia, Wrangel Island as well as North America.
This huge yellow-eyed white bird is unmistakable. It is 53-65 cm long with a 125-150 cm wingspan. The adult male is virtually pure white, but females and young birds have some dark scalloping; the young are heavily barred, and dark spotting may even predominate. Its thick plumage, heavily-feathered feet, and coloration render the Snowy Owl well-adapted for life north of the Arctic Circle.
Snowy Owl calls are varied, but the alarm call is a barking, almost quacking krek-krek-krek-krek; the female also has a softer mewling pyee-pyee-pyee-pyee or "prek-prek-prek". The song is a deep repeated gawh. They may also clap their beak in response to threats or annoyances. While called clapping, it is believed this sound may actually be a clicking of the tongue, not the bill.
Snowy owls have incredible vision. They can see from high up in the sky and swoop down silently to captur
e their prey. Like all owls they have good night vision. They are nocturnal and diurnal hunt at night but in the Arctic it doesn't get dark in the summer so the owls hunt in the daylight too. When the owl gets food it swallows it whole or tears it into large pieces to swallow. The Snowy Owl is typically found in the northern circumpolar region, where it makes its summer home north of latitude 60 degrees north. However, it is a particularly nomadic bird, and because population fluctuations in its prey species can force it to relocate, it has been known to breed at more southerly latitudes. During the last ice age, there was an Central European paleosubspecies of this bird, Bubo scandiacus gallicus, but subspecies are not recognized among the living population.
This species of owl nests on the ground, building a scrape on top of a mound or boulder. A site with good visibility, ready access to hunting areas, and a lack of snow is chosen. Gravel bars and abandoned eagle nests may be used. Breeding occurs in May, and depending on the amount of prey available, clutch sizes range from 5 to 14 eggs, which are laid singly, approximately every other day over the course of several days. Hatching takes place approximately five weeks after laying, and the pure white young are cared for by both parents. The mother stays on the nest and the father brings her food and protects her. After the owlets are born both parents work to feed the owlets. In eight weeks the owlets are ready to leave the nest. This is important because the summers are so short in Arctic regions. If the owlets weren't ready to take care of themselves they would not survive the cold winter.
This powerful bird relies primarily on lemmings and other rodents for food, but at times when these prey are not available, or during the ptarmigan nesting period, they may switch to ptarmigan young. As opportunistic hunters, they feed on a wide variety of small mammals and birds, and will take advantage of larger prey, frequently following traplines to find food. Nesting birds require roughly two lemmings per day, and a family may eat up to 1500 lemmings before the young birds set off to fend for themselves. Due to their beauty, Snowy Owls are kept in captivity by wildlife centers, zoological gardens and by serious hobbyists. They are known to be sensitive to disease, stress and heat, frequently perishing during attempts to train a wild owl during the summer. These owls are not suitable for beginning raptor keepers.
( Original Source : Library Thinkquest Website and Wikipedia Encyclopedia, Photo Source : upload.wikimedia.org/wikipedia/commons/6/6d/Snowy_Owl_(240866707).jpeg )
