I think the picture is photoshopped, not sure why someone would do that considering with a quick google search you can find black wolves that have been shot by hunters. I think the size is definitely exaggerated. I own 2 70 lbs dogs and when my 5' 10" husband holds them (alive at that) they look rather large in his arms. A wolf has a super furry coat and therefore is going to look a LOT bigger. My neighbor owns two wolf hybrids, a male and a female. The male is probably over 100 lbs, if he were shot and my husband were to hold him it would make an impressive photo.
I highly doubt the animal was shot in the S. US, probably in Alaska or Canada. Unless the wolf is a hybrid, like my neighbors dogs. A good friend of mine owned a non wolf hybrid black dog that easily weighed 125 lbs, we called him Bear. He was HUGE and FURRY. A bad photo could have easily been taken and then used as a "wolf" photo.