Geckos are lizard

Lizard

Lizards are a widespread group of squamate reptiles, with nearly 3800 species, ranging across all continents except Antarctica as well as most oceanic island chains...

s belonging to the infraorder Gekkota

Gekkota

Gekkota is an infraorder of reptiles in the suborder Scleroglossa, comprising all geckos and the limbless Pygopodidae. The legless lizards of the family Dibamidae are also referred to as blind lizards but recent molecular phylogenies suggest they are not gekkotans.Gekkota are a suborder of...

, found in warm climate

Climate

Climate encompasses the statistics of temperature, humidity, atmospheric pressure, wind, rainfall, atmospheric particle count and other meteorological elemental measurements in a given region over long periods...

s throughout the world. They range from 1.6 cm to 60 cm.

Geckos are unique among lizards in their vocalizations, making chirping sounds in social interactions with other geckos. Geckos are the second most species rich group of lizards (after skinks), with close to 1,500 different species worldwide and many others likely yet to be discovered.