A FEW WORDS ON LIZARDS
Lizards are terrestrial vertebrate animals whose lives are independent of water. They use lungs for breathing throughout their lives. Their bodies are covered with thick dry skin which prevents them from drying up too fast. The skin formation protecting the body is a horny layer occasionally shed by the animal and subsequently renewed. Their body temperature is variable for they are cold-blooded animals, which presupposes that their body temperature is equal to the temperature of the environment. They absorb heat from the environment by exposing themselves to the sun. Lizards can be active either during the daytime or at night.
Adult lizards are between a few centimetres and three metres in length. Their osseous skeleton is inside the body and they have a dorsal nervous system. Lizards exhibit sexual dimorphism, i.e. males and females can be easily discerned. Their nerves and sense organs are well developed.
Most lizards lay eggs while some also have live hatchlings. A typical lizard feature is the amniotic egg. It is an evolutionary acquisition which enabled lizards and reptiles in general to be independent of their water habitat.
Lizards mostly live on insects and small rodents. Some are omnivores or herbivores. They detach their tails in order to escape from predators by diverting their attention while the lizards gain time and escape. The missing tail regenerates. Lizard species are highly diversified with regard to their habitat, the food they eat and other characteristics, therefore each species has its specific needs.