陆龟, or "land tortoise," refers to a group of reptiles that primarily live on land. They belong to the family Testudinidae and are known for their distinctive hard shells, which provide protection from predators. These tortoises are herbivorous, feeding mainly on grasses, leaves, and fruits. 陆龟 can be found in various habitats, including deserts, grasslands, and forests. They are slow-moving creatures with a long lifespan, often living for several decades. Some species, like the 加拉帕戈斯陆龟, are famous for their size and unique adaptations to their environments.