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.םינבל םיספ םירבוע ויפנכו ופוג ,ושאר ךרואל ,ןבל ועבצ ,הנוי לדוגכ ולדוג :ןפיס .םימב ופוג תא עיקשמ םימעפלו החוש םיתיעל ,תורופא תולוחכ וילגרו הלעמ יפלכ לקועמ ורוקמ .תורהנ יכפשבו תשביה םינפבו םי יפוח ,הצחמל םיחולמ וא םיחולמ םימ יווקמו תוציב ולודיג תיב .םיחולמ םימגא דיל רתויב רידנ ןנקמו רידנ ץיק רקבמ ,יוצמ ףרוח רקבמו חרוא רבוע ץראב | ||||||||||
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Subspecies and Distribution.
Recurvirostra avosetta Europe through W and C Asia to Siberia and China, and locally through N Africa to E and S Africa. Winters from W Europe and Africa through Middle East to NW India and China. | ||||||||||
Descriptive notes.40-45 cm, 225-400 g, tarsus 77-98 cm. Unmistakable, mainly white with black forehead, crown to below eyes, nape and upper hindneck. At rest, shows three distinctive black bands on mantle and scapulars, lesser and median upperwing coverts, and outer 6 primaries, bill black and strongly upcurved, long legs, blue grey.Female tends to have shorter, more strongly curved bill. No seasonal variation. Juvenile similar to adult. Habitat.Breeds in flat, open areas typically at shallow saline lades, lagoon, pools, and estuaries with sparse vegetation.Outside breeding season also frequents muddy tidal flats, infrequently found on fres hwater lakes and even rivers. Food and FeedingCarnivorous, taking great variety of mainly aquatic invertebrates, particularly aquatic insects, crustaceans, and worms, rarely fish and plant material.Most often feeds by picking or by tactile scything of bill through water or mud, sometimes feeds communally. Breeding.Apr-Aug in Eurasia. Nests in large colonies. Nest is typically a grass lined scrape in open ground or amongst short vegetation.3-4 eggs, incubation 23-25 days, by both sexes. Downy young silver grey above grading to buff on sides of head, wing and sides of back, with small black spots on crown, two lines of larger parallel spots on back and spots on thighs. Age of first breeding 2-3 years. Movements.N temperate birds mainly migrate Aug-Oct to tropical and warm temperate regions. Return movements in Mar-May, with many African migrants using Banc d'Arguin, Mauritania, as brief stopover. Some local overwintering elsewhere in W Europe. Patterns in Asia poorly documented, but wintering birds occupy Persian Gulf, NW India and SE China, presumably from C Asian breeding grounds.E and S African birds sedentary or locally dispersive. Status and ConservationNot globally threatened. Extensive range, with over half of population reckoned to breed in europe, locally abundandt in several parts of Africa.Israel.In Israel subspecies Recurvirostra avosetta. Fairly common passage migrant, scarce summer visitor and uncommon winter visitor, also very rare breeder in winter. |
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