My best guess is a coywolf. To state the obvious a cross of a yote and wolf. No way was it a wolf pup as they are much bigger this time of year. Nearing full grown. Yet there is no way in my mind this is a coyote either!! That is my size 11 boot next to it's back leg. That is a lot of leg for a young coyote. Also look at the size of them ears. They are longer than the muzzle. I really don't know for sure. I do know that I have seen hundreds of coyotes from pups to monster adults. This did not look like a pure coyote to me!
The world may never know the truth. Since the only evidence of it possibly existing is this picture. Even then this may be a internet hoax .