This is so interesting!!
https://www.npr.org/2019/09/04/7575...-squirrels-eavesdrop-on-birds-researchers-say
Forgot to add:
And I already suspected as much. The chickens do the same exact thing. So funny watching them stand like statues under a bush whenever they hear or see a hawk or anything

And of course I’ve seen many bunnies, squirrels, chipmunks, etc. all do it. Even seen the song birds react when the crows are divebombing a hawk! Very cool to watch.