Frog is an animal of Amphibia Anura. Adults have no tail, eggs are laid in water, fertilized in vitro, hatched into tadpoles, and breathed through gills. After metamorphosis, adults mainly breathe through lungs and skin.
habitat
Because the skin is bare, it can't effectively prevent the evaporation of water in the body, so they can't live without boiling water or humid environment, and they are afraid of drought and cold. So most of them live in tropical and temperate rainy areas, and there are very few species distributed in the cold zone.
When I was a child, I could only live in water, and when I grew up, I could live on land. Frogs breathe with their lungs, but they can also draw oxygen from the air through moist skin. Various pigment cells in its skin will also spread or contract with the humidity and temperature, thus changing the depth of skin color. Frogs usually live in paddy fields, ponds, ditches or grass along rivers, and sometimes they lurk in the water to hunt at night.