Deer are graceful, herbivorous mammals found in forests, grasslands, and mountains across the world. Known for their agility and speed, they belong to the Cervidae family, which includes species like white-tailed deer, mule deer, elk, and moose. Male deer typically grow antlers that are shed and regrown each year, used for defense and mating displays. Deer play a vital role in ecosystems by controlling vegetation and serving as prey for large predators. Their keen senses of smell and hearing help them detect danger. Deer are also culturally significant, symbolizing gentleness, alertness, and harmony in many traditions and folklore.