Quadrupeds are animals that walk on four limbs. This group includes a variety of species, such as dogs, cats, horses, and cows. Their body structure is adapted for stability and speed, allowing them to move efficiently across different terrains. Quadrupeds can be found in many habitats, from forests to grasslands. Most quadrupeds have a similar skeletal structure, featuring a backbone, four legs, and a skull. They are classified into two main categories: ungulates, which are hoofed animals, and carnivores, which primarily eat meat. Quadrupeds play essential roles in ecosystems, serving as both predators and prey.