Squirrels. These pests are a cross between chipmunks and rats. They dig up our yard and mulched areas. Steal tomatoes from our garden. Tried everything over the years. Best method was a trap. I caught over 70 of 'em over a three year period. Gave up. Didn't make a dent in the population. We have oak trees and a hickory tree as do neighbors. Squirrelburg, U.S.A. They mock me when I'm outside in the yard from the safety of their bark apartments. Hate them with a passion.