The Family Heteromyidae is a group of rodent species found in North and South America. They are commonly known as kangaroo rats, pocket mice, and spiny mice. These small, nocturnal mammals are adapted to living in arid environments and are characterized by their long hind legs, which are used for hopping, and their kangaroo-like pouches. Kangaroo rats and pocket mice have fur-lined cheek pouches, which they use to store food for later consumption. Spiny mice, on the other hand, have sharp spines on their back and tail for defense. These unique rodents are an important part of the ecosystem and have many interesting adaptations that help them survive in harsh environments.