In my neighborhood it is murder squirrels...they are impervious to human interaction and the oak trees dropping copious amounts of acorns make them feel invincible
I like squirrels!! Had 1 jump out of a tree while riding my bike a few months ago, growling at me, landed on my arm, growled, then jumped off and ran away growling, kinda odd, 18years riding in the forest new first.
Hell you should see the static I get when I knock one out of the neighbours tree with a pellet gun. Imagine what I'd have to endure if I strangled the little bastard.