Am not sure about the picture shown here, but I can tell you from personal experience that they can weigh well in excess of 150 pounds. The Fish and Wildlife killed seven of them on the next door ranch and all of them were that big. They have no problem taking down a big horned elk or moose. Over the past several years while the Game and Fish and the Fish and Wildlife Service were haggling over wolf protections I have had many opportunities to shoot a wolf. Now that it is completely legal, shooting one is on my Bucket List. Joe