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How do kangaroos differ from wallabies?

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Red kangaroos on the move — kangaroo A group of red kangaroos (*Macropus rufus*) using their powerful hind legs and feet to hop.

The distinction between kangaroos and wallabies is primarily based on size rather than a strict biological classification, as both belong to the family Macropodidae.

In common usage, the term "kangaroo" refers to the largest members of this family, such as the red kangaroo and the gray kangaroos, which can grow significantly larger and heavier than wallabies. Conversely, "wallaby" is a general term for the middle-sized and smaller species within the same family.1234

Because these animals are closely related, the terminology can be fluid:
* Size and Build: Kangaroos are generally larger and more powerful, while wallabies are typically smaller and more compact.13
* Classification: Both are marsupials and share similar anatomical features, such as powerful hind legs adapted for hopping. Some species, such as those in the genus Macropus, are sometimes referred to as kangaroos or wallabies depending on their specific size and regional naming conventions.23
* Diversity: Wallabies exhibit a wide range of specialized adaptations based on their environment, such as the rock wallabies (Petrogale), which are highly agile on rocky terrain, and the hare wallabies, which share some behavioral traits with hares.3