That's pretty mind blowing. The top of the list there is Rüppell's vulture, which was confirmed in 1973 to have been flying at 37,000 ft, identifiable by feathe

That's pretty mind blowing. The top of the list there is Rüppell's vulture, which was confirmed in 1973 to have been flying at 37,000 ft, identifiable by feathers it left behind when it was ingested by a jet engine. Unlucky bastard. You think you're safe, 7 miles above the earth, far from any predator, when WHAM. At least it was a quick death.