Squirrels are not native to the Salt Lake Valley floor. We have some on the hills, but haven't had any natives in the valley, ever. However, fox squirrels are making their way into the valley. First sighted about 10 years ago along the Jordan River green belt. They don't seem to compete with the natives living in the hills, and since none were native on the valley floor, no one seems overly concerned. I think it means I may have new targets moving in though.