【摘要】 本世纪以来对虎斑夜鳽分布地点的新发现,表明该种从滨海到内陆漫布于中国长江以南广大地区,并向北渗透直逼东洋界北限秦岭-淮河一线;作者据此将各地的虎斑夜鳽初划为11个亚群,提出目前该种存有3个相对健康而稳定的亚群,即黄山-天目山亚群、南岭亚群和广西亚群,且每个亚群的分布范围均至少不会小于5000km2,其中以黄山-天目山亚群的记录由历史至现今相对最为长久而完整,进而提出今后在上述诸亚群范围之外还会有新的发现。文中指出,尽管近期对虎斑夜分布状况有了新认识,目前仍可视该种的受胁等级为濒危。更多还原

【Abstract】 The White-eared Night Heron(Gorsachius magnificus)has been treated as Critically Endangered(CR)and Endangered(EN)due to its rarity and the known highly fragmented distribution(Collar et al.,1994;IUCN,19976;BirdLife Internat.,2000,2001),and the most mysterious heron bird in the world(Fellows et al.,2001).In fact,until the very end of the 20th century,only about some 20 localities of the bird at county level had been reported since the bird was recognized in 1899,whilst,new sites found of the bird since the beginning of the 21st century have revealed that the bird is much widely distributed(He et al.,2007),and,until up-to-date,13 new sites of the bird has been reported,bringing with them two new provinces(Jiangxi and Hunan)in central S China and one new province(Yunnan)in SW China enlarging the whole range of the bird remarkably.(See the sketch map)Based upon the new knowledge and understanding on all the far reported sites of the bird,from historical to present,the bird might hence be considered as being of 11 relatively separate subpopulations.更多还原