Hundreds of millions of birds are taking to the skies each night, southward-bound in search of warmer weather - so many that you can spot them on weather radar. It’s data that researchers can use to ...

Bird migration represents one of nature’s most remarkable phenomena, where millions of feathered travelers navigate thousands of miles using nothing but instinct and celestial navigation.

1. Field observations of migration -- 2. Experimental evidence for bearing-and-distance navigation -- 3. The physical bases of diurnal one-direction navigation -- 4. The physical bases of nocturnal ...