【摘要】 黑翅鸢(Elanuscaeruleus)近年来在福建省的分布范围逐渐扩大,在福建省南部和东部为留鸟.对黑翅鸢的繁殖生态学研究结果说明,黑翅鸢繁殖期从4月～12月,筑巢对树种具有一定的选择性,每次繁殖都要重新筑巢,主要巢材为枯树枝,巢离地高度都在11m以上(n=4),巢外径为40cm,巢高30cm,巢深10cm(n=1).黑翅鸢每窝繁殖雏鸟3～4只,离巢时的雏鸟成活率都达到100%(n=4).繁殖期的黑翅鸢食物主要为鼠类.黑翅鸢的繁殖期长,繁殖力强,雏鸟成活率高,对人类活动环境的适应能力强,这可能是近年来黑翅鸢分布范围能够扩大的主要原因.更多还原

【Abstract】 The Black-shouldered Kite (Elanus caeruleus) recently has increased its distribution range in Fujian.It has become a resident bird in south and east Fujian.The kite has distributed in many provinces near the coast in south China.Investigation on the breeding ecology of the Black-shouldered Kite shown that the breeding period of Black-shouldered Kite was from April to December,the kite enjoy to nidificated on specific tree species,and built new nest at each breeding.The nests were made up of branches of tree mainly and their heights were more than 11 m (n=4).The outside diameter of nest was 40 cm,height was 30 cm,and depth was 10 cm (n=1).The clutch size was 3 to 4 and their incubation rate was 100% (n=4).The food of the kite was mouse mainly in breeding period.The Black-shouldered Kite had long breeding period,high reproductivity,high survival rate of its juvenile and stronger adaptive ability to human environment.These breeding characteristics are postulated to be the main reasons that the Black-shouldered Kite can expand its distribution range.更多还原