Gray wolves are one of the most common of all wolves.
Gray wolves can survive in many biomes. As long as food is plentiful and the climate is cold.
Gray wolves have wooly fur to give them insulation and long guard hairs to keep out moisture.
They have big paws with fleshy pads and claws that help with traction and support in the snow. Wolves have a senses of hearing twenty times sharper than an average human and a sense of smell a hundred times keener.
The gray wolf's jaw can deliver a crushing pressure of 500 pounds every square inch. A wolf's vision is motion sensitive and the have a reflective retina called tapetum which enhances night vision, but they can't see color.
Wolves have incredible stamina, they can cover a distance more than eighteen miles at a quick trot. They have have a top speed of about 40 miles per hour.