* Mammals: All mammals have paired limbs, with the forelimbs being arms and hands in humans and the hindlimbs being legs and feet. Some mammals, like bats, have wings modified from their forelimbs.
* Birds: Birds have forelimbs that are modified into wings and hindlimbs that are used for walking, running, or perching.
* Reptiles: Most reptiles have four limbs, with some exceptions, such as snakes, which don't have any limbs. Lizards, crocodiles, and turtles all have paired limbs.
* Amphibians: Amphibians have four limbs, with the forelimbs being shorter than the hindlimbs. Frogs, toads, salamanders, and newts all have paired limbs.
* Fish: Some fish, such as the hagfish, don't have any limbs, while others, like the coelacanth, have paired fins that they use for swimming.
Paired limbs provide animals with a variety of benefits, such as increased stability and mobility, the ability to grasp objects, and the ability to move in different environments.