LifeSpeedy bat flies at 160km/h, smashing bird speed record Brazilian free-tailed bats may have snatched the title for the fastest muscle-powered flight, outpacing even the record-holding common swift 51¶¯Âþ
LifeFirst evidence birds nap in flight without dropping out of sky Brain recorders fitted to 14 great frigatebirds show these birds sleep on the wing, usually while circling in rising air currents 51¶¯Âþ