Crested auklets communicate with the help of a citrus smell.
Sophisticated X-rays reveal primitive feathers trapped in amber.
Migrating birds sleep with half their brains at a time.
Declining populations hide the fact that birds are migrating ever earlier due to global warming.
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Hear author Xiaoming Wang interviewed by Vittorio Maestro, Editor in Chief of Natural History. (MP3, 17 minutes) |