White-tailed deer are known to eat over 600 species of plants in North America. They consume, on average, about 5 to 8 pounds of food for every 100 pounds of body weight, per day. As a result, a deer, on average, defecates about 13 times a day. A crude but somewhat accurate way to estimate how many white-tailed deer are in your area is to count the number of scat piles you find in a square mile within 24 hours, and divide this number by 13. A little snow on the ground would make this particular method of population estimation a lot easier!