Each year, as winter approaches, many bird species undertake an exhausting migration, sometimes hundreds or even thousands of miles long. Birds will fly south to find more temperate climates, which is ...

Bird migration is one of nature’s greatest wonders. Every year, birds travel across continents in search of food and suitable climates. They complete these journeys without modern tools or digital ...

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 ...