| .ןטק רוברב (65 | ||||||||||
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.םיריחנל לעמ לגועמב םייתסמ רוקמה לע בוהצה םתכה ,ראוצ רצקו ןטק : ןטק רוברב .הרדנוטו תוציב ולודיג תיב .רתויב רידנ יארקאב ןמדזמ ץראב 3 'ה 'א םיכלמ ...םיסובא םירוברב... | ||||||||||
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Subspecies and Distribution.
C. c. bewickii N Siberia W Europe, China, Korea and Japan. C. c. columbianus. Arctic North America to U S A. | ||||||||||
Descriptive notes.130cm, 4,5-9,5 kg, wingspan 130 cm. Female smaller.Juvenile has some grey feathers and and a mostly pinkish bill. Race bewickii smaller, with far more yellow on base of bill. Habitat.Winters on marshes, grasslands or agricultural fields, often in coastal regions.Breeds on shallow pools, lakes and rivers of arctic tundra. Food and FeedingMainly leaves, roots, rhizomes and stems of aquatic plants, in winter complemented with grain and potatoes.Forages by head dipping and upending in shallow water or by grazing on land. Day feeding where un disturbed. BreedingMay-Jun in single pairs.Nest is large mound of vegetation, on elevated ground. 3-5 eggs, incubation 30 days. Chicks have pale grey down. Sexual maturity 3 years old. Movements.Migratory, winters in temperate areas, sporadically in more southern latitudes during cold winters.Status and Conservation.Not globally threatened.Israel.In Israel the subspecies C. c. bewickii Accidental visitor, occasional during winter. |
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