The coyotes in the East are part red wolf. That’s why they are so large. I have seen 50-70 pound coyotes in my neighborhood.
In North Florida, at least, the mix is from red wolf,through coyotes through domestic dogs. It is obvious if one sees more than a couple of them in the almost-wild as around the power plant where I am a security guard, mostly at night when the canines venture onto the grounds to harass the deer that are all over the place. I have seen one that looked like classic coyote of maybe 45 pounds but with a mottled coat and ears that did not stand erect in the company of one that would be termed a wolf if a hunter saw it.