Mammals are air-breathing, warm-blooded vertebrate animals characterized by the possession of hair, three middle ear bones, and mammary glands functional in mothers with young. Most mammals also possess sweat glands and specialized teeth. 
    The largest group of mammals, the placentals, have a placenta which feeds the offspring during gestation. The mammalian brain, with its characteristic neocortex, regulates endothermic and circulatory systems, the latter featuring red blood cells lacking nuclei and a large, four-chambered heart maintaining the very high metabolism rate they have. 

Odocoileus virginianus
    White-tailed deer have relatively short ears and are tawny brown in color. Their bushy tail, brown above and white below, "flags" from side to side when they are running. They are excellent swimmers, can run 35 miles per hour and jump an 8-foot fence. 
     During severe winters whitetails gather in areas near abundant food and cover. Bucks have antlers with 3-6 unforked points on each beam. Antlers start growing in spring and are shed in late winter. The peak of the whitetail breeding season, or rut, occurs in November. 
    Young does usually have one fawn in May or June while twins are usually the norm in older does and triplets aren't uncommon. Each fawn weighs about 5 pounds. They can live up to 15 years in the wild. They are the most popular big game mammal in the United States.     
    White-tailed deer feed mostly at dawn and dusk on leaves, stems, buds and bark. They also eat acorns, grain crops and alfalfa
    These deer tracks were observed along the stream bank at Hurricane Creek Park in May 2012. Deer tracks tracks have two toes (hooves), that make an upside-down heart-shaped track.  Learn how to tell the size of a deer by its tracks with this chart.