为什么鸟儿站在树上睡觉不会掉下来呢？这与鸟类特殊的腿部结构有关。鸟类蹲下时，它会拉伸与脚趾相连的肌腱，带动脚趾合拢。所以鸟儿在睡觉时， 它的爪子会毫不费力地弯曲并紧紧抓住树枝，直到腿部伸直，爪子才会松开。

Soldiering through nightly suspended animation, a (nearly) all-sugar diet, backwards flight and long migrations, the birds’ ...

They flit to and fro, perching on branches and leaves while they plan their next move. Sure, a quadcopter can land on the ground, but then it has to spend more energy getting back to altitude.

Shrikes, often called 'butcher birds,' exhibit unique hunting behaviors by impaling prey on sharp objects like thorns and ...

Over the years Debbie Harry’s precision-chiselled features have been captured in museum-worthy portraits by numerous artists, ...

Our pets may be an endless source of love, but they're also an endless source of laughter and entertainment! Dogs and cats ...

Tourists from near and far have been visiting this historical landmark beach in New England for so long, and it's still a ...

The Giant Kingfisher is a true ‘fisherman’ with a strong preference for fish. It hunts from a perch, diving fast and ...

Little lizards that wear snout bubbles underwater really do seem to be using them as tiny scuba tanks. Water anoles (Anolis ...

Aotearoa New Zealand is a land of birds, from the smallest of wrens to the mightiest of moa. The ancestors of some species ...