Im not a bird man but was watching a thing on telly and was amazed to learn they fly at over 10,000m.
Apparently the fact they are "flappers not gliders" generates enough excess body heat to prevent their wings icing in minus 35 deg temps at that altitude. And something about micro blood vessels enables them to not only function but perform in the rairifyed atmosphere.
They were filmed crossing the Himalayan alps. Impressive.
Same as our Geese?
Bookmarks