The lizards present/display the extended body and place setting of grudges. Generally, they have four legs and one long tail that, in some species is very fragile and it is broken with facility, although it can return to regenerate. The arborícolas lizards, like the chameleons, can use their long tail to take hold themselves to the branches. Some species very have the reduced legs and others are them lost completely, adopting a serpentiforme aspect; nevertheless, they are different from the true serpents because they have movable eyelids and a different craneal bony structure. They are animals of cold blood that depend on the heat of the Sun to increase their temperature corporal.

The lizards move of diverse ways; the basiliscos and the lizards of necklace can run quickly on their back legs, very developed. The basiliscos are able also to run on the surface of the water thanks to their back legs and their tail in whip form. The gecos have sticky discs in the ventral part of their fingers that allow them to adhere perfectly to the substrate. Some lizards are good swimmers and others live in trees.

Its diet varies from species to others. Many are insectivorous and others, like the common iguana, are herbívoras. The monster of Gila, that lives in desert areas, feeds on eggs of reptiles and birds, as well as of small rodents. The varanos, depending on their size, are fed on insects, birds and reptiles and their eggs, small mammals, and carrion.

Like most of the reptiles, the lizards do not take care of of their young. The females usually put eggs that leave their luck. Few species are ovovivíparas (their eggs are developed inside the mother).

The gecos and salamanquesas are small lizards with the massive body, four legs affluent developed and short and fleshy tail; thanks to which have in the fingers sticky discs they can move by vertical surfaces. The iguanas are own of the American continent and usually present/display a row of thorns in the back of the body and a long and resistant tail. The chameleons are arborícolas lizards that use their long and prensil tail and their fingers transformed into clamps to take hold itself to the branches; they are able to change of color and they are fed on insects that hunt with their long and sticky language.

Eslizones or escincos presents/displays the extended body and cylindrical and they have a small size generally, of not more than 12 cm in length; some species very have the reduced extremities. The lución is an apodal lizard of serpentiforme aspect that in case of danger can lose the tail to distract its predators. The varanos present/display a united small head to a long and movable neck, robust legs provided with powerful nails, and a long and powerful tail.

The typical lizards and the small lizards of the Old World belong to the Lacértidos family (Lacertidae), whereas those of the American continent form the Teídos family (Teiidae).