ABSTRACT ‘Peeks’, or keeping an eye open, in wintering Common Pochard Aythya ferina, while in a sleeping posture, were relatively brief, typically (66% of observations) lasting less than one second. However, in 37% of individuals some peeks lasted 10 s or more. Contrary to our prediction of lower anti-predatory vigilance rates in larger groups, there was a positive relationship between peek duration and the numbers of neighbours in a flock.

中文翻译：

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鸭子“偷看”的持续时间：Common Pochards Aythya ferina 在睡姿中睁眼的时间是多少？

摘要 在越冬的普通潜鸭 Aythya ferina 中，“偷看”或睁大眼睛，虽然处于睡眠姿势，但时间相对较短，通常（66% 的观察结果）持续不到一秒。然而，在 37% 的个体中，某些窥视持续了 10 秒或更长时间。与我们对较大群体中较低的反捕食警戒率的预测相反，偷看持续时间与鸡群中邻居的数量之间存在正相关关系。