Nestling Diet of Eastern Meadowlarks in East-central Illinois

被引:0
|
作者
Ostrand, Susan Linn [1 ]
Bollinger, Eric K. [1 ]
机构
[1] Eastern Illinois Univ, Dept Biol Sci, Charleston, IL 61920 USA
来源
WILSON JOURNAL OF ORNITHOLOGY | 2012年 / 124卷 / 02期
关键词
POPULATION TRENDS; GRASSLAND BIRDS; SELECTION; PATTERNS; ENERGY; FOOD; SPIDERS; CORN;
D O I
暂无
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
We observed Eastern Meadowlark (Sturnella magna) nests in Conservation Reserve Program grasslands in east-central Illinois to examine the influence of the surrounding agricultural landscape on nestling diets. Esophageal ligatures were applied to 3and 6-day old nestlings to examine food items brought to the nest. The most common items were spiders (44% of total volume; primarily wolf spiders [Hogna spp.1), followed by orthopterans (23%; crickets, grasshoppers, and katydids), and lepidopteran larvae (18%, primarily cutworms). Adult Eastern Meadowlarks foraged more often than expected in soybean fields.
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页码:399 / 402
页数:4
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