Real audio recordings of wild wolves out in nature. Are they alone? On the hunt? Baying at the full moon? Either way, a wolves' lonely howling can send a chill down your spine.

The gray wolf or grey wolf (Canis lupus) also known as the timber wolf, or western wolf, is a canid native to the wilderness and remote areas of North America, Eurasia, and northern, eastern and western Africa. It is the largest extant member of its family, with males averaging 43–45 kg (95–99 lb), and females 36–38.5 kg (79–85 lb). Like the red wolf, it is distinguished from other Canis species by its larger size and less pointed features, particularly on the ears and muzzle. Its winter fur is long and bushy, and predominantly a mottled gray in color, although nearly pure white, red, or brown to black also occur. As of 2005, 37 subspecies of C. lupus are recognised by MSW3. The nominate subspecies is the Eurasian wolf (Canis lupus lupus), also known as the common wolf.