RE: I know the answer to this question, let's see who else knows the real answer
When a prey animal spots a predator,many species of prey may give analarm call (putting turkeys, barking squirrels, stomping/snorting deer, etc). It's nature's way for prey to notifythe predator (or suspected predator)that the jig is up and that any attack is not likely going to succeed. Both species can save energy if a likely-unsuccessful attack is aborted.
-fsh