These seemingly ominous birds are really just friendly nighttime socializers.

I read Yuki Watanabe's 'Birds Sleep While Flying'.Birds Sleep While FlyingResearch using biologging has unraveled the ...

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 ...

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 ...

For birds and other animals that spend the winter outdoors in Norway, every available moment of daylight is important. They ...