Swifts spend ten months a year entirely airborne, study reveals

Research using miniature tracking devices suggests that swifts eat and sleep in the sky, as some birds did not land at all during their migratory periodSwifts already hold the title of the fastest fliers on Earth and now the small soot-brown birds have been revealed as one of nature’s greatest endurance athletes, after scientists discovered they spend ten months of the year entirely airborne.Using miniature trackers, scientists observed that some birds did not land once during their migrat