Discover 10 birds that can sleep while flying, including swifts and frigatebirds, and learn how unihemispheric sleep helps ...
Each year, billions of birds take part in migrations that seem almost unbelievable. With the help of instincts, stars, ...
Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Frigatebirds can remain airborne for days at a time without ...
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