Bagotskaia M S, Smirnova A A, Zorina Z A
Zh Vyssh Nerv Deiat Im I P Pavlova. 2010 May-Jun;60(3):321-9.
The ability of hooded crows (Corvus cornix L.) and common ravens (Corvus corax L.) to pull up a bait suspended from a horizontal perch by a string was tested. It was shown that some birds of both species successfully solved the string-pulling task. Considerable inter-individual and inter-species differences in task performance are discussed.
对秃鼻乌鸦(Corvus cornix L.)和大嘴乌鸦(Corvus corax L.)通过绳子拉起悬挂在水平栖木上的诱饵的能力进行了测试。结果表明,这两个物种的一些鸟类成功解决了拉绳任务。文中讨论了任务表现中显著的个体间和物种间差异。