A young wolf is called a pup. The average number of pups born at once is between four and six. This is the litter, and the siblings are called litter mates.
Mother wolves give birth to their young in a den for protection after a 63-day gestation period. The pups are around 1 pound at birth and are deaf and blind. Pups grow quickly and after three weeks are strong enough to venture out of the den. Pups love to play in the open, and at this size are often preyed upon by hawks, eagles and bears. The entire pack of wolves helps raise the pups, and by 3 months, they are big enough to hunt with the adults.