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Why do salamanders need moist habitats?

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Study an amphibious tiger salamander of the mole salamander family Ambystomatidae in its natural habitat — Caudata Tiger salamanders (*Ambystoma tigrinum*) are widespread across much of the United States. Although they are generally black with yellow blotches, bars, spots, or even stripes, some are lighter in colour or have olive markings. Tiger salamanders belong to the mole salamander family, Ambystomatidae.

Salamanders require moist habitats primarily because of their unique skin, which is thin, smooth, and highly vascularized. This specialized integument serves as a vital organ for respiratory gas exchange, allowing the animals to absorb oxygen and eliminate carbon dioxide directly through their skin.123

Because their skin is gas-permeable, it also facilitates the diffusion of water and ions between the salamander and its environment. To maintain proper physiological function and prevent dehydration, salamanders must absorb water through their skin, making a damp or aquatic environment essential for their survival. In many species, including the lungless salamanders of the family Plethodontidae, this cutaneous respiration is the primary or even exclusive method of breathing, further cementing their dependence on moisture.342