why does the eagle fly so high?

Answer 1

The higher they are, the bigger the area they can look for food.

Answer 2

are you for real? actually, through evolution, some birds have developed lung systems that allow them to function on less oxygen and so they can endure altitudes where the air is thin.

Or are you referring to that stupid song?

Answer 3

area coverage.

Answer 4

gremilns...