From sleeping standing up to shutting down half of their brain, animals have some strange sleeping habits.

动物们有一些奇特的睡觉习惯，有的站着睡觉，有的一半大脑休息。

Now some of these more unusual habits, from napping giraffes to birds that sleep while flying, have been revealed in an infographic.

现在一些更不寻常的睡觉习惯已经用信息图表展示出来了，从打瞌睡的长颈鹿到边飞边睡的鸟类都有记录。

The chart maps the liveliest to the idlest creatures to reveal that Little brown bats are most lethargic, sleeping for around 19.5 hours a day.

图表展示了从最活泼的动物到最懒惰的动物，其中小型棕蝙蝠是最嗜睡的，一天大概睡19.5小时。

This long period of sleep is thought to be a way of conserving energy and means they only hunt for a few hours each night when their insect prey are available.

这样长时间的睡眠被认为能够保存能量，这意味着每天晚上它们只有几个小时在捕捉昆虫。

In contrast, giraffes can go weeks without sleep and when they do grab some shut eye, it’s never for more than five minutes.

相比之下，长颈鹿可以几个星期不睡觉，它们真正闭上眼睛的时间也不会超过5分钟。

This is because being large and slow moving giraffes are constantly vulnerable to attacks from predators, and therefore can’t sleep for long periods.

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