Watch the beautiful race of some small deer

deer, (family Cervidae), any of 43 species of hoofed ruminants in the order Artiodactyla, notable for having two large and two small hooves on each foot and also for having antlers in the males of most species and in the females of one species. Deer are native to all continents except Australia and Antarctica, and many species have been widely introduced beyond their original habitats as game animals. One species, the reindeer (also known as the caribou), has been domesticated. Some swamp and island species are endangered, but most continental species are flourishing under protection and good management. Deer, when granted some protection, readily exploit man-made disturbances caused by agriculture, forestry, and urbanization. White-tailed deer, normally a cherished North American game animal, have even become pests in suburbs and cities in the United States and Canada.