| .ןטק יאנקש (29 | ||||||||||
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.ןותחתה ופוג קלח התוחפ הדימבו דרדרו ובג ,רפרפא ועבצ :ןטק יאנקש .יוצמה יאנקשה לש הזמ רצקו ןטק ורוקמ .םותכ םדמדא וא בוהצל רופאמ הנתשמ וילגר עבצ .םייבורגנמ תוציבו םיילוח םייא ,םיצע לע ןנקמ .םי יפוח םימעפל ,םייתנוע םימגאו תורהנ ,תוציב ,םיקותמ םימ ימגא :ןווגמ ולודיג תיב .רתויב רידנ יארקא ןמדזמ ץראב 'א ,ג"ס ןילוח - דומלתב רכזנ יאנקש םשה | ||||||||||
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Subspecies and Distribution.
Pelecanus rufescens Sabtropical and tropical Africa from Senegal and Ethiopia to Natl. from Madagascar to Arabia. | ||||||||||
Descriptive notes.125-132 cm; 4-7 kg, bill 30-38; wingspan 215-290 cm, Female slightly smaler.Pale greyish tinged plumge with pinkish back and, to lesser extent, underparts; leg colour variable, ranging from grey to yellow or reddish orange. Bare parts duller outside breeding season, especially pouch, and black patch in front of eye lacking. Smaller and shorter billed than sympatric P. onocrotalus. Juvenil similar to adult, but browner above, with only faint pink tinges. HabitatVery variable. Prefers freshwater lakes, swamps, rivers and seasonal ponds; sometimes along coast, especially in bays, and also on alkaline lakes.Breeds in trees, opten along waterfront, also sandy islands, mangroves and even by civilization; trees may be killed by repeated nesting Roosts on cliffs, coral reefs, sand-dunes and sometimes piers or walls in areas where food abundant. More tolerant of humans than are ground-nesters. Food and FeedingFish mostly 80-300 g, Like P. onocrotalus prefers cichlids, but takes plenty of fry and uses different techniques, frequently fishing alone. Estimated daily requirement 900-1200 g.Breeding.Breeds all year round, mostly starting late in rains. Tree-nester, in colonies mostly of 20-500 pairs; smallish stick nest.Average 2 egg; incubation 30 days, Sexual maturity at 3-4 years; estimated adult breeding life of 6 years on average Relatively high chick mortality due to sibling aggression. Movements.Mostly dispersive, especially juveniles, but some regular movement N into sub Saharan steppes for wet season.Vagrant to Egypt and Israel. local movements possibly related to water conditions or beginning of breeding. Less dependent on thermals than P. onocrotalus. Status and ConservationNot globally threatend.Widesperad and common, locally abundant, especially in sub-Saharan zone. Difficult to estimate poulation, due to tree-nesting and less gregarious tendencies. Israel.In Israel subspecies Pelecanus rufescens. Accidental visitor. |
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