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Some amphibians, such as the common coquí, lay eggs out of water (in this case, on palm leaves). These are adaptations to life on land: amphibia were the first vertebrates to have these features. They also have eyelids, glands and ducts which keep the eyes moist. Sight Īmphibians have colour vision and depth of focus for clear sight. Where they live in the same area, the newts get more poisonous, and the snakes develop more resistance to the poison. Research into the rough-skinned newt and the garter snake shows this is a typical case of co-evolution. They may be in vivid colours of red, black, and yellow. Connected to this is the use of warning colouration. This is an important defence against predation. Their colour gives them camouflage, which is their main defence.Īlternatively, many other amphibia have toxic skin, which is harmful to predators. Defences Īmphibians may be camouflaged in brown and green, and if so they are prey for birds and reptiles. Adult amphibians use lungs, and they also get oxygen through their skin, so long as it is moist. There have also been species which live in forests, deserts and arctic conditions.
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#LAID IN AMERICA TORRENT SKIN#
Adult amphibians also use their skin to take in oxygen, and some species of salamanders do not have lungs. When they are adult, they have lungs to breathe instead of gills, and legs. The tadpoles change into adults in a process called metamorphosis. After hatching they are tadpoles, which live in the water and have gills. They are four-legged vertebrates which are cold blooded.Īmphibians lay their eggs in water, usually in a foam nest. The living ones are frogs (including toads), salamanders (including newts) and caecilians. Eryops, typical of the large-size early amphibians 310–295 million years agoĪmphibians are members of the class Amphibia.