Living in clouds: Meet the bird that eats, sleeps and lives almost entirely in the sky for ...

A remarkable bird spends up to 10 months airborne, eating, sleeping, and even resting mid-flight, pushing biological limits ...
来自MSN

The Only Bird That Sleeps For Months While Flying

Just when you think nature couldn’t possibly surprise you anymore, it does. Among the many remarkable creatures that fill our skies, one bird has achieved something so extraordinary it almost sounds ...