Size matters. When you are the size of this squirrel, you can hang out just about anywhere you want. It's not uncommon to see rats walking the wires between telephone poles in some neighborhoods, but, I believe in our neighborhood we only see squirrels.
Of course, we get the occasional opposum walking the fence or a kit fox prowling the streets, but, mainly squirrels. Squirrels love to steal birdseed, peanuts, chew on PVC conduit and make dogs bark. Squirrels really enjoy making dogs bark! They leap from the wire to a tree to a tree to the roof while the dogs run themselves silly. You can hear the squirrels giggling as they scamper off to another yard.