White-tailed Deer - young buck (Odocoileus virginianus). New York, USA. Found over much of the U.S. southern Canada and Mexico and introduced elsewhere in the world. Lives in forests, swamps and open brushy areas. A browser, eats twigs, shrubs, fungi, acorns and grass and herbs in season. The most important big game mammal in the eastern U.S. Can do considerable damage to young orchards and vegetable crops if population not controlled.