Some bird species possess incredible ability to sleep while flying, allowing them to complete their long journeys while conserving energy.

Learn how to identify a male and female tree swallow. Find out about their nests, song, range map and what tree swallows eat.

Birds have a unique digestive system that allows them to eat when they can—usually on the fly—and digest later. They use their beaks to grab and swallow food. Even the way a bird reproduces is ...

Visit BBC Webwise for full instructions With its distinctive forked tail, the swallow is an easily-identifiable garden bird.Swallows leave their wintering grounds in southern Africa at around the ...