Lizards (Class:Reptilia Order: Squamata)
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3751 described species 383 genera and 16 families
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Distributed in N.W. from Canada to Tierra del Fuego
in O.W. from Norway to N.Zealand .
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Habitats: Terrestrial, arboreal, fossorial &
semi-aquatic
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Four legs in most, some have reduced legs or none at
all. certain scales may be modified into spines.