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首页> 外文期刊>The wilson journal of ornithology >Predation and Scavenging on Other Birds by Western Meadowlarks (Sturnella neglecta) during a Spring Snowstorm
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Predation and Scavenging on Other Birds by Western Meadowlarks (Sturnella neglecta) during a Spring Snowstorm

机译：春季暴风雪期间西部草地lar（Sturnella neglecta）对其他鸟类的捕食和清除

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摘要

Severe weather can cause birds to abandon normal foraging habits and switch to more opportunistic behaviors. We report 47 incidents of Western Meadowlarks (Sturnella neglecta) consuming five bird species during a spring snowstorm on the high plains of southeastern Wyoming, including four previously undocumented species. Over half (57%) of our observations were of meadowlarks scavenging dead birds, 13% were of meadowlarks preying on live birds, and in 30% of the cases we could not determine how consumed birds died. Interestingly, the species most frequently depredated by meadowlarks, Horned Lark (Eremophila alpestris), is larger than any avian species previously known to be preyed on by meadowlarks. Our observations suggest that meadowlarks may be more capable and frequent predators of adult birds than previously recognized.
机译：恶劣的天气会导致鸟类放弃正常的觅食习惯，而转向更多的机会主义行为。我们报告了怀俄明州东南部高平原春季春季暴风雪期间发生的47个西草地lar（Sturnella neglecta）消耗了五种鸟类，其中包括四种先前未记录的物种。在我们的观察中，有超过一半（57％）是草地lar清除死鸟，有13％是草地lar捕食活禽，在30％的情况下，我们无法确定食用鸟如何死亡。有趣的是，最常见的是由草地的百灵鸟捕食的鸟类，有角的云雀（Emmophila alpestris），比以前已知的所有由草地的百灵鸟捕食的鸟类更大。我们的观察结果表明，与以前认识到的相比，草地雀可能是成年鸟类更能干和更频繁的捕食者。

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