Nest and Nest-site of Narcissus Flycatcher in Xiaolongmen Forestry, Beijing
北京小龙门林场黄眉姬鹟的巢与巢址特征

During 2003-2006, forty-three nests of Narcissus Flycatcher (Ficedula narcissina elisae) were found in Xiaolongmen Forestry, Beijing. Among the 43 nests, nine nests were found in nest boxes while other 34 nests were constructed both on open sites (29.4%) and in holes (70.6%). The 10 open nests were weaved between several upward twigs, and the 24 hole-nests were built in hollows, trunks or on stumps. Open nests had larger height above ground than the hole-nests. Narcissus Flycatchers only used the nest boxes with big entrances. The majority of nest trees were Betula dahurica. Vegetation characteristics of nest sites were measured in the samples around the nests with a radius of 6 m. According to the result of Principle Component Analysis on the variables describing the nest-site characteristics, the forest with big trees and abundant stumps provided appropriate nest sites for Narcissus Flycatchers. Of the 43 nests we found, 22 (51.2%) were successful, those that failed were destroyed by predators.