A beautifully executed project here, I bought Neal a coffee.
What evolutionary advantage, I wonder, is there to Ruppell's griffon vulture flying at 11400 meters?
edit: units
replies(3):
[1] https://en.wikipedia.org/wiki/List_of_birds_by_flight_height...
[2] https://web.archive.org/web/20131011012320/http://blogs.bu.e...