All are examples of adaptive radiation:
Australian marsupials: Australia is home to a wide variety of marsupial mammals, including kangaroos, koalas, and wombats. These animals evolved from a common ancestor over millions of years, and they have adapted to a variety of different ecological niches. For example, kangaroos are large, grazing animals that live in open grasslands, while koalas are arboreal animals that live in eucalyptus trees.
Australian placental mammals: Australia is also home to a variety of placental mammals, such as bats, rodents, and dingoes. These animals evolved independently of the marsupials, and they have also adapted to a variety of different ecological niches. For example, bats are flying mammals that feed on insects, while dingoes are carnivorous mammals that prey on other animals.
Darwin's finches: Darwin's finches are a group of 18 species of finch that live on the Galapagos Islands. These finches evolved from a common ancestor over millions of years, and they have adapted to a variety of different diets. For example, some finches have long, slender beaks for catching nectar, while others have short, stout beaks for cracking seeds.
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