The weight of white-tailed deer varies by sex, with the male of the species, which is known as a stag or a buck, averaging anywhere from 150 to 300 pounds. Female white-tailed deer, which are referred to as cows or does, weigh anywhere from 90 pounds to 200 pounds.
Young deer are known as fawns or calves, and they weigh anywhere from 4 to 8 pounds when they are born. A fawn's age can generally be foretold by its spots because fawns lose their spots by the age of 4 months.
By the time a fawn is weaned, it has gained an incredible amount of weight. At just 4 months or so, the male fawn will weigh from 80 to 85 pounds with the female weighing from 75 to 80 pounds.