Because of their nocturnal habits, very little was known about how scorpions live.

因为蝎子的夜行习惯，人们过去对它们的生活所知甚少。

Phylogenetically constrained character mapping coincides with a reconstruction of the owl group's early evolutionary reversal away from nocturnal habits.

系统发育受限的特征映射与猫头鹰群体早期进化逆转远离夜间习性的重建相吻合。

Their nocturnal habits mean they are rarely seen—“otters give so little of themselves it's hard to know them, ” Ms Darlington writes.

只是它们习惯夜间出没，很少有机会让人们看到，“水獭透露给人们的信息很少，要了解它们非常困难”达林顿这样写到。

Difficult to spot because of their mostly nocturnal habits, and sporting cryptic plumage that helps them melt into landscapes, owls, writes Jennifer Ackerman, are the most enigmatic of birds.

由于猫头鹰大多是夜间活动的习性， 詹妮弗·阿克曼 (Jennifer Ackerman) 写道，而且它们身上的神秘羽毛有助于它们融入风景，因此很难被发现， 它们是最神秘的鸟类。