Iguanas are reptiles, not amphibians. They belong to the family Iguanidae, which is part of the larger class of reptiles.
Reptiles are characterized by their scaly skin, which helps prevent water loss, allowing them to thrive in various environments, particularly on land. In contrast, amphibians, like frogs and salamanders, typically have moist skin and require a more aquatic environment for part of their life cycle.
Iguanas are known for their distinctive features such as a long tail, strong limbs, and often vibrant colors. They primarily inhabit tropical and subtropical regions and are fully adapted to life on land, basking in the sun and feeding on a diet of plants. This adaptation to a terrestrial lifestyle is a key indicator of their classification as reptiles.