http://gizmodo.com/this-amazing-little-bird-can-fly-for-nearly-a-year-stra-1788301932

Researchers have just discovered evidence that common swifts (a
small type of bird) can spend 10 continuous months per year in the air without
landing—a world record for sustained flight in nature.

The birds are extremely common in Europe, where they land for two months to
breed, spending nights roosting in the nests they build themselves. After
breeding, they fly off to Africa, where no one has ever discovered roosting
areas, and now we finally know why.

Biologists at the University of Lund, led by Anders Hedenström, made the
discovery that common swifts are able to stay aloft for at least 10 months by
capturing some in southern Sweden, where they nest, and attaching micro-data
loggers onto the birds. The team of researchers has reported their findings in
Current Biology.

Thanks to Owen Morse.