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首页> 外文期刊>The Wilson Bulletin >Food, Foraging, and timing of breeding of the black swift in California
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Food, Foraging, and timing of breeding of the black swift in California

机译:加利福尼亚黑迅疾的食物,觅食和繁殖时间

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摘要

The nestling diet and breeding seasonality of the Black Swift (Cypseloides niger) were studied in southern California 1990-1992. The peak (40/100) of egg laying was in mid-June and the peak of fledging (60/100) was mid-to late August (n = 87 nests). Winged ants comprised 91/100 (n = 1179 prey items, 10 boluses) of Nestlingdiet. Three main prey size classes were found: 6, 8, and 13 mm. Food bolus mass increased and number of trips per day to feed the nestlings decreased with nestlingage.
机译:1990-1992年在加利福尼亚南部研究了黑雨燕(Cypseloides niger)的雏鸟饮食和繁殖季节。产蛋高峰(40/100)是在6月中旬,而出雏高峰(60/100)是在8月中下旬(n = 87个巢)。有翼的蚂蚁由雀巢饮食的91/100(n = 1179个猎物,10个大剂量)组成。发现了三种主要的猎物尺寸类别:6、8和13毫米。随着刚孵出的雏形,食物团的质量增加,每天喂雏的次数减少。

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