| .רש רוברב (66 | ||||||||||
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.החונמ תעשב ףוקז וראוצ
.יוצמה רוברבה לש ורוקמב ומכ החיפת ןיא וסיסבבו בוהצ ורוקמ :רש רוברב .יוצמה רוברבה לשכ תוחפוט אלו הקירש לוק תועימשמ ויפנכ ופועמב .הדח תיוזב םייריחנל עיגמו ןטקה רוברבה לש ורוקמל האוושהב לודג ורוקמ לע בוהצה םתכה .םימ יחמצ רקיעב ונוזמ ,םיקותמ םימ יווקמ ולודיג תיב .ףרוחה תדידנ ןמזב יארקאב ןמדזמ ונצראב 3 'ה 'א םיכלמ ...םיסובא םירוברב... | ||||||||||
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Subspecies and Distribution.
Cygnus cygnus Iceland, Scandinavia to Siberia, winters in W C Europe to Aral Sea and China and Japan. | ||||||||||
Descriptive notes.150 cm, 7,5-12,5 kg, wingspan 145 cm. Female smaller.Juvenile has grey feathers and has pinkish rather than yellowish base to bill. Habitat.Winters on low agricultural land, generally not far from coast.Breeds in northern zones, on shallow fresh waters: pools, lakes and rivers in wooded country. Rarely in tundra. Food and FeedingMainly aquatic plants and grass during the breeding season, complemented with grain and potatoes.Forages by head dipping and upending in shallow water or by grazing on land. BreedingApr-May in solitary pairs.Nest on large mound of vegetation, mainly moss and lichens. 4-5 eggs, incubation 35 days. Chicks have pale grey down. Sexual maturity 4 years old. Movements.Migratory, part of Icelandic population remains in winter .Migrates southwards to temperate areas, vagrant U S A and Pakistan.Status and Conservation.Not globally threatened. Sliht increase in overall numbers since early 1970's.Israel.In Israel the subspecies Cygnus cygnus Accidental visitor, during winter. |
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