| .ףוס-םי ןותפ (27 | ||||||||||
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. ספסופמ ופוגו םירוחש ויפנכ תוצק ,ןבל ובורב ועבצ :ףוס-םי ןותפ .ופוגמ ךוראו קד ובנזו רוחש וניע ספ .הנוי ומכ ויפנכב חפוט ופועמ תעשב .םיקחורמ םינטק םייאב םישיגנ אל םיקוצ לע ןנקמ .םיסוניקוא רקיעב םייפורטבסו םייפורט םימי ולודיג תיב .תליא ץרפמב ןמדזמ רקבמ ץראב | ||||||||||
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Subspecies and Distribution.
P. a. aethreus S Atlantic. P. a. mesonauta E Pacific, Carivvean and E Atlantic. P. a. indicus Persian Gulf of Aden, Red Sea. | ||||||||||
Descriptive notes.90-105 cm;700 g, wingspan 99-106 cm. Largest tropicbird; black mask slightly larger than in other species and sometimes joined across nape in worn plumage.Streamers of male average longer than those of female. Juvenile has yellow bill, lacks tail streamers, and black eyestripes meet on nape; otherwise resembles adult. Race mesonauta probably shorter-winged, has rosy flush in fresh plumage, and the dark areas of upper parts and flight-feathers are blacker; race indicus smaller, has orange bill with black cutting edges, and smaller black mask. HabitatTropical and subtopical seas; mainly pelagic.Breeds on small, remote oceanic islands; prefers inaccessible spot on cliff, where take-off relatively easy. Food and FeedingMostly small fish, especially flying-fish, also squid.Diet varies locally, squid apparently mor important in Indian Ocean populations. Most prey caught by plunge-diving, but flying-fish sometimes taken in flight. Breeding.Season in places, elsewhere can be more or less continuous. Loosely colonialNest is in rocky crevice, or scrape on ground; little or no material. 1 egg; incubation 42-44 days, chicks hatch with grey down, fledging 80-90 days. Age of sexual maturity unkown. Oldest ringed bird at least 10 years old. Movements.No regular migration; some adults can be seen vicinity of colonies all year round.Extensive dispersal, especially of juveniles, often over waters fairly near breeding grounds, birds from Cape Verde Is. move to areas of upwilling off W Africa; but many disperse much further out to sea, and adults from Galapagos known to wander some 1500 km. Status and ConservationNot globally threatend.Probably least numerous of tropicbirds, and may numbers under 10,000 pairs. Israel.In Israel subspecies P. a. indicus.. Accidental visitor, observed Eilat, Arava and Ded Sea. |
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