Marsupials

Marsupials are a group of mammals characterized by their unique reproductive process. They give birth to relatively undeveloped young, called joeys, which then crawl into their mother's pouch—a specialized skin fold—where they continue to develop and grow. Common examples include kangaroos, koalas, and opossums. Most marsupials are native to Australia and nearby islands, though some, like opossums, are found in the Americas. Their reproductive system differs from placental mammals, emphasizing short gestation and extended pouch nurturing, adapted to various environments and lifestyles.