European deer are a diverse group of mammals belonging to the family Cervidae. They are found across various habitats in Europe, including forests, grasslands, and mountains. Common species include the red deer, roe deer, and fallow deer, each with unique characteristics and behaviors. These animals are known for their antlers, which are typically shed and regrown annually. Deer are herbivores, primarily feeding on leaves, grasses, and fruits. They play a crucial role in their ecosystems by helping to maintain plant diversity and serving as prey for larger predators like wolves and bears. Their populations are managed in many regions to balance ecological health and human interests.