標題: Seen 28 [打印本頁] 作者: xodnvnzm 時間: 2016-3-4 12:38 標題: Seen 28
This species has been regarded as Near Threatened because it is diagnosed to have a moderately small, heading downward population. 2003. AERC TAC Checklist regarding bird taxa occurring in Developed Palearctic region, 15th Draft. Cramp, Azines.; Perrins, C. M. 1977 1994. Guide of the birds of The european countries, the Middle East and Cameras. The birds of the western Palearctic. J.; Christie, D. A new.; Elliott, A.; Fishpool, L. D. G. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge Great britain: Lynx Edicions and BirdLife International.34cm. Medium sized nimble falcon with long narrow chicken wings and long tail. Flight immediate and elastic with unexpected swoops and dives but also increasing and gliding on toned wings. Adult Sooty grey all over. On upperwings contrast between dark primary wing coverts but altogether lacking contrast in underwings. Teen: Show pale tips to upperpart plumage and yellow buff underparts using sooty grey streaking. Throat, hindneck and cheeks all yellowish buff. Similar spp. Size slightly larger than P. subbuteo, but smaller than F. eleonorae. Has a resemblance to dark morph F. eleonorae but with more prominent yellow cere, fraud colourous underwings and jizz more akin to F. subbuteo. Juvenile even more comparable, best seperated by stuctural differences and also broad Beats Pill Speaker dark terminal group on undetail. 1988). Most of the population winters in Madagascar, but a smaller but unknown proportion winter season in coastal Mozambique and far east South Africa (south to southern Natal), and there is also limited about wintering in the southern part of the procreation range. Estimating the total populace has proved notoriously tricky, and the population may have been overestimated in the past. However, there are now considered no more than a few thousand wintering around Madagascar and a recent review of almost all Arabian census data, (which is apparently surprisingly comprehensive for this type), and found that the total Arabian inhabitants are probably just below 500 propagation pairs (Jennings and Sadler 2006, M. Hawkins in litt. 2007). Given that the Arabian human population are generally regarded as the largest within its range (perhaps half the world population), the calculate from Madagascar may indeed be accurate (Jennings and Sadler 2006). Historical evidence from Madagascar indicates some sort of decline, and this is mirrored by data from breeding hives in the Middle East (Kavanagh and Master 2003, F. Hawkins in litt. 3 years ago, M. McGrady in litt. 2007); every single latter when surveyed shows a decline relative to previous survey results (McGrady and Nicoll The year 2008, Shah et al. 2008). Present-day estimates of the total populations range from 1,000 50,000 pairs, roughly comparable to 2,000 80,000 mature individuals and 3,500 120,000 individuals as a whole (Nicoll et al. 2008). Hawkins in litt. 2007) suggest Ugg Australia New Zealand there may simply be a few thousand; this is place into the banded range 10,Thousand 19,999 mature individuals imminent new information. Its colony is a shallow depression dug into the ground (Gaucher et ing. 1988). It is a migratory species, having birds arriving in their wintering good grounds in Madagascar and south east Africa from late October, and also returning to breeding sites inside April (del Hoyo et 's. 1994). Migrants generally travel singly, or in pairs or modest flocks (Brown et al. In the eightys, Ferguson Lees and Christie 2001). Nevertheless, human disturbance may be a consider some areas, including Bahrain's Hawar Island destinations (Kavanagh and King 2008, McGrady and also Nicoll 2008). Increased pesticide utilize has been suggested as a causal factor, but egg analysis suggests it is at very low values in these birds.Conservation Steps UnderwayA two year pilot survey had been conducted on the offshore destinations of northern Oman during Two thousand and seven 2008, including the marking with birds with PIT jewelry and gathering of blood samples and unhatched eggs (McGrady et alabama. Research the ecology of not for breeding and migrating parrots to assess potential threatening techniques. Oppose developments which would encroach with breeding colonies. Restrict admission to important breeding colonies. Do surveys, to locate further mating colonies and determine the ratio of birds that winter months outside Madagascar. Establish annual keeping track of at the important sites within the Daymaniyat and Fahal Islands, Oman. Survey shoreline areas near Muscat, where guideline data exist from The late seventies, to better quantify population diminishes. 1994. Sooty Falcons in the United Arab Emirates. Tribulus terrestris 42(2): 14 19.Brown, L. H.; Downtown, E. K.; Newman, K. In the eightys. The birds of The african continent vol I. Academic Press, Liverpool.del Hoyo, J.; Elliott, A.; Sargatal, T. 1994. Handbook of the Chickens of the World, vol. 2: New World Lions to Guineafowl. Lynx Edicions, Barcelona, Spain.Ferguson Lees, C.; Christie, D. Ugg Auckland Shop A. 2002. Uggs Boots Auckland Raptors of the world. Christopher Helm, London.Gaucher, S.; Petit, T.; Symens, P. 1988. Records on the study of the Sooty Falcon (Falco concolor) while in its breeding season throughout Saudi Arabia. Alauda 56(3): 277 283.IUCN. 2013. IUCN Red List of Threatened Species (ver. 2013.2). (Reached: 13 November 2013). 2007. Report on the activity of the small birds of prey and owls group. Breeding Centre regarding Endangered Arabian Wildlife, Sharjah, UAE.Kavanagh, B. in addition to King, H. 2008. Studies from 1998 2006 to the breeding population of sooty falcons Falco concolor around the Hawar Islands, Kingdom of Bahrain. Sandgrouse 35: 70 76.McGrady, M. C.; Nicoll, M. A. C. 2008. A study Buy Monster Beats In Nz of the status and distribution of breeding Sooty Falcons (Falco concolor) within the northern islands of Oman 07 2008.McGrady, M.; Nicoll, A.; Williams, D. 2009. Sooty Falcon survey in Oman. Phoenix: 4.McGrady, M.; Nicoll, M.; Williams, N. 2008. Ugg Boots Nz Hamilton A pilot survey regarding Sooty Falcons on islands of North Oman. Phoenix: 7 8.
