Reptiles are scaly skinned animals which live in many different habitats mainly in warm regions . They include crocodiles, lizards, snakes and tortoises.
Reptiles are coldblooded, but this does not mean that their blood is cold. A reptile’s body cannot keep its blood warm, and the animal has to control its temperature by moving between hot and cool places.
Reptiles bask in the sun to gain energy to hunt, and are often less active at cooler times of year.
A reptile’s skin looks slimy, but it is quite dry. It keeps in moisture so well that reptiles can survive in deserts. The skin often turns darker to absorb the sun’s heat.
Although reptiles grow for most of their lives, their skin does not, so they must slough (shed) it every now and then.
Amphibians are animals that live both on land and in water. They include frogs, toads, newts and salamanders.
Most reptiles lay their eggs on land, but amphibians hatch out in water as tadpoles, from huge clutches of eggs called spawn.
Like fish, tadpoles have gills to breathe in water, but they soon metamorphose (change), growing legs and lungs.
Amphibians never stray far from water.
Reptiles were the first large creatures to live entirely on land, over 350 million years ago.