newScientist: 6 months in the air? Swifts, natures endurance mini drone…

20131014-194818.jpgSwifts stay airborne for six months at a time: by Andy Coghlan. 08 October 2013
It’s possible young swifts don’t spend much or any time on the ground for three years.
Some theorize sleeping on the wing or shutting down half the brain. But it’s known that dolphins and suspected other large marine mammals can be awake for weeks at a time with no harm.