鹿科 (Cervidae) is a family of mammals commonly known as deer. This family includes various species such as 白尾鹿 (white-tailed deer), 驯鹿 (reindeer), and 梅花鹿 (sika deer). Deer are characterized by their long legs, slender bodies, and antlers, which are typically found on males. They are herbivorous animals, primarily feeding on leaves, grass, and fruits. Deer are found in diverse habitats, including forests, grasslands, and wetlands across the world. They play a crucial role in their ecosystems by helping to maintain plant diversity and serving as prey for larger predators like 狼 (wolves) and 熊 (bears). Their social structures can vary, with some species being solitary while others form herds.