I have seen all our ducks go running and quacking for their coop and those silly chickens are still out in the yard scratching around and clueless!
We are also surrounded with tall pine trees and huge oak trees with a large number of small gray Squirrels. At any given time I can look around...
I have to agree with you and didn't realize myself how attentive ducks really are to their surroundings, especially in the sky. Too funny to watch all twelve ducks standing still and all tilting their heads to one side and look up as a plane or bird flies over. LOL
My guess is the term...