Gray's monitor

The Gray's monitor (Varanus olivaceus) is a large (180 cm, >9 kg) monitor lizard known only from lowland dipterocarp forest in southern Luzon, Catanduanes, and Polillo Island, all islands in the Philippines. It is also known as Gray's monitor lizard, butaan, and ornate monitor. It belongs to the subgenus Philippinosaurus. It is largely arboreal and extremely shy. The population of northern Luzon was formerly included in the Gray's monitor, but has been recognized as a separate species, the northern Sierra Madre forest monitor (V. bitatawa), since 2010.

Gray's monitor
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Family: Varanidae
Genus: Varanus
Subgenus: Philippinosaurus
Species:
V. olivaceus
Binomial name
Varanus olivaceus
Hallowell, 1857
Range of Varanus olivaceus prior to 2010. In 2010, it was found that the northern populations are of distinct and new species.
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