Kangaroos have a highly specialized reproductive system. Female kangaroos have two uteri and can be simultaneously pregnant with different-stage embryos. They can pause the development of one embryo (embryonic diapause) while nurturing another joey in their pouch.

 Kangaroos are known for their powerful hind legs, which are adapted for hopping. They are the only large mammal that uses hopping as its primary means of locomotion, and they can cover large distances at high speeds, hopping at up to 40 mph (64 km/h) for short bursts.

Female kangaroos have a pouch in which they carry and nurse their young, called joeys. The pouch is not just a convenient space for the joey; it also provides them with essential protection and nourishment. Joeys can stay in the pouch for several months, depending on the kangaroo species.

Kangaroos are herbivores, primarily grazing on grasses and plants. They have a specialized digestive system with a large chambered stomach that allows them to efficiently break down fibrous plant material. Kangaroos are also known for their ability to conserve energy by regurgitating and re-chewing their food (similar to cud-chewing in some ruminants).

Kangaroos belong to the Macropodidae family, which includes various species and sizes. The red kangaroo is the largest marsupial, standing over 6 feet tall and weighing up to 200 pounds (90 kg). On the other hand, the smallest kangaroo species, the musky rat-kangaroo, is about the size of a rabbit. Kangaroos come in a wide range of sizes, colors, and adaptations, making them a diverse group of animals.