灰喜鹊的繁殖生态和巢位选择Ⅰ.繁殖生态

灰喜鹊的繁殖生态和巢位选择Ⅰ．繁殖生态汝少国侯文礼（青岛海洋大学海洋生命学院，２６６００３）（东北师范大学环境科学系，长春１３００２４）刘云李多元（青岛海洋大学海洋生命学院，２６６００３）（东北师范大学环境科学系，长春１３００２４）ＴｈｅＢｒｅｅｄｉ...

The Breeding Ecology and Nest Habitat Selection of Azure Winged Magpie ( Cyanopica cyana ) I.The Breeding Ecology.

Azure_winged magpie ( Cyanopica cyana ) is a kind of resident bird mainly distributed in the low elevation (altitude below 900m) in Changbai Mountain. The birds begin to mate in later March every year. The flourishing period of building nests is from May 1 to 10. The great majority of nests are built on the middle and upper parts of the artificial larch ( Larix olgensis ); A full clutch consists of 4-9 eggs, with the average is 7 eggs. The Incubation is carried out by female and lasts for 16-19 days. The nestling begin to leave from the nest after 17-19 days. The percentage of the nestlings alive averages 73.2%. The young birds are feeded chiefly with insects of Coleoptera, Lepidoptera and Orthoptera . Basid on the growth measuring of the young birds, the Logistic equation of the weight, body length and wing length,were established.