Amphibians

Amphibians are a group of cold-blooded vertebrates that typically have a two-stage life cycle—beginning in water as larvae with gills, then transitioning to land as adults with lungs. They include frogs, toads, salamanders, and newts. Amphibians have smooth, moist skin that helps them absorb water and oxygen, making their skin vital to their survival. They are often sensitive to environmental changes, serving as important indicators of ecosystem health. Amphibians lay eggs in water, and many must stay near moist habitats to survive. Their unique life cycle and skin adaptation distinguish them from other animal groups.