The grey wolf (aka timber wolf) is native to the wilderness and remote areas of North America, Eurasia, and North Africa. Their modern range in North America is mostly confined to Alaska and Canada, with populations also occurring in northern states. It is the largest extant member of the canine family, weighing 70-100 lbs. Their winter fur is long and bushy, and predominantly mottled gray in color, although nearly pure white, red, or brown to black also occur. Gray wolves howl to assemble the pack (usually before and after hunts), to pass on an alarm (particularly at a den site), to locate each other during a storm or in unfamiliar territory, and to communicate across great distances. Wolf howls can, under certain conditions, be heard over areas of up to 50 square miles but are generally indistinguishable from those of large dogs. The gray wolf is a habitat generalist, and can occur in deserts, grasslands, forests, or arctic tundra and generally specializes in vulnerable individuals of large prey.