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Geckos are unique among lizards for their vocalisations, which differ from species to species. Most geckos in the family Gekkonidae use chirping or clicking sounds in their social interactions. Tokay geckos (Gekko gecko) are known for their loud mating calls, and some other species are capable of making hissing noises when alarmed or threatened ...
They grow to a length of between 7.5–15 cm (3–6 in), and live for about 7 years. These small geckos are non-venomous and not harmful to humans. Most medium-sized to large geckos are docile, but may bite if distressed, which might pierce skin. The common house gecko is a tropical species, and thrives in warm, humid areas where it can crawl ...
Gekkonid geckos occur globally and are particularly diverse in tropical areas. Many species of these geckos exhibit an adhering ability to surfaces through Van der Waals forces utilizing intermolecular forces between molecules of their setae (foot hair) and molecules of the surface they are on.
Pygopodidae, commonly known as snake-lizards, or flap-footed lizards, are a family of legless lizards with reduced or absent limbs, and are a type of gecko. [2] The 47 species are placed in two subfamilies and eight genera. They have unusually long, slender bodies, giving them a strong resemblance to snakes.
Numerous species of lizard are kept as pets, including bearded dragons, [71] iguanas, anoles, [72] and geckos (such as the popular leopard gecko). [71] Monitor lizards such as the savannah monitor and tegus such as the Argentine tegu and red tegu are also kept.
Lizard scales may differ strongly in form on different parts of the lizard and are often of use in taxonomy to differentiate species (or higher taxa, such as families). For instance, members of the family Lacertidae have large head plates (Figure 2) while geckos have no such "plates" but only very small head scales.
Currently there are about 40 extant families of Lacertilia.These vary considerably, e.g. in shades, colours, and sizes. For example, the largest representative among Geckos, the New Caledonian giant gecko (Rhacodactylus leachianus), has a length of up to 36 cm (14 in), while the largest species in the family Varanidae, Komodo dragon (Varanus komodoensis), has a length up to 3 metres (10 ft ...
[2] [3] The phylogenetic analysis of Conrad (2008), which did not support a close relationship between geckos and legless lizards, used Gekkonomorpha in a much more restrictive sense so that it included only Gekkota and a few extinct lizards more closely related to Gekkota than to any other living group of lizards (making them "stem" gekkotans ...