Birds resting on a beach or a wire often look calm, almost detached from what is happening around them. But that stillness can be misleading. For many species, sleep is not a full shutdown. One eye ...

Moving‍‌‍‍‌‍‌‍‍‌ long distances through migration is a hard task that often pushes the animals' physiological limits. However, the case of birds that can sleep while flying is probably the most ...

A few weeks ago when I was out cycling with some friends, we saw a few birds who looked like they were sleeping. Someone asked me what they were doing, and I said they were resting or sleeping but I'd ...

Add Yahoo as a preferred source to see more of our stories on Google. As daylight fades, most birds seem to disappear without a trace. While nocturnal species like owls become active, the vast ...

We've all had a bad night's sleep, with a snoring partner, a crying baby or neighbors having too much fun. Sleep disturbances are common and have unpleasant consequences the day after, including ...

Have you ever seen a bird sleeping on a thin tree branch and wondered why it does not fall? While humans may lose their grip when their muscles relax during sleep, many birds can remain safely perched ...

Editor’s note: This story was originally published in February 2018. Free time is dangerous for me. I ponder imponderable questions, like “Do birds sleep?” Well, yes, but not the same way we do, and ...

The benefits of sleep are shared across the animal kingdom. Sleep saves energy by slowing down the metabolism and allows animals to avoid high-energy activities. For vertebrates, sleep is an essential ...

The weariest warblers are more likely to sleep with their heads tucked in — saving energy, but making them more vulnerable to predators. By Emily Anthes Every spring, throngs of garden warblers make a ...