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Amerikanska kazarka Branta bernicla nigricans pidvid chornoyi kazarki z rodini kachinih i gusyachih pidrodini Kazarka amerikanskaOhoronnij statusNajmenshij rizik MSOP 3 1 Biologichna klasifikaciyaCarstvo Tvarini Animalia Tip Hordovi Chordata Klas Ptahi Aves Ryad Gusepodibni Anseriformes Rodina Kachkovi Anatidae Rid Kazarka Branta Vid B berniclaPidvid B b nigricansTrinomialna nazvaBranta bernicla nigricans Lawrence 1846 Vikishovishe Branta bernicla nigricansPoshirennya red Voditsya na Alyasci zimuye v Baha Kaliforniyi Ohoronnij status red Na sogodnishnij den v miscyah jogo prozhivannya nalichuyetsya blizko 114 000 ptahiv i priblizno 14 000 shorichno vidstrilyuyutsya mislivcyami Populyaciya na 1981 rik bula 200 000 ptahiv a na 1987 rik u dva razi menshe Literatura red Millington Richard 1997 Separation of Black Brant Dark bellied Brent Goose and Pale bellied Brent Goose Birding World 10 1 11 15 an identification paper Syroechkovski E E C Zockler and E Lappo 1998 Status of Brent Goose in northwest Yakutia British Birds 93 2 94 97 this paper presented claims that Black Brant and Dark bellied Brent Goose were interbreeding extensively in the Russian Arctic Sangster George 2000 Taxonomic status of bernicla and nigricans Brent Goose British Birds 91 12 565 572 a critical re evaluation of the claims made in the above paper by Syroechkovski et al Bloomfield Andrew and James McCallum 2001 Changing fortunes of the Black BrantBirding World 14 2 66 68 discusses the history of Black Brants in Europe and the history of hybridisation between Black Brant and Dark bellied Brent Goose Martin John 2002 From the Rarities Committee s files Unusual Brent Geese in Norfolk and Hampshire British Birds 95 3 129 136 this article discusses two Brent Geese seen in Norfolk and Gempshir in 1998 99 which showed some but not all characters of Black Brant photographs of both accompany the article Wynn Russell 2002 Brants the hybrid problem Birdwatch 118 16 18 an examination of possible hybrid Black Brant Dark bellied Brent Goose based on wintering birds in Hampshire Black Brant Geese an indicator of wildlife sustainability in the Georgia Basin Environment Canada Retrieved October 10 2006 nbsp Ce nezavershena stattya z ornitologiyi Vi mozhete dopomogti proyektu vipravivshi abo dopisavshi yiyi Otrimano z https uk wikipedia org w index php title Kazarka amerikanska amp oldid 37995418