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Description
The black rough-necked monitor, also known as Varanus rudicollis, is a species of monitor lizard native to Southeast Asia, specifically found in Thailand, Burma, Malaysia, and parts of Indonesia. It inhabits primary and secondary rainforests as well as mangrove swamps. In the wild, it is rarely sighted due to either its scarcity or secretive nature.
This lizard, belonging to the subgenus Soterosaurus, shares a close evolutionary relationship with the water monitor species complex. It is characterized by its medium to large size, typically growing to 3-4 feet (90-120 cm) in length, though occasionally reaching up to 5 feet (150 cm). Adults are distinguishable by large pointed scales on their necks and possess a slender body with a notably pointed snout.
Regarding behavior, black rough-necked monitors are recognized for their calm temperament, seldom displaying aggression such as biting or tail whipping. When threatened, they prefer defensive tactics such as fleeing, puffing up their throats, or feigning death by closing their eyes.
Studies on their diet reveal a varied palate including insects, ants, termites, frogs, spiders, scorpions, and various other invertebrates. They are active throughout the year, with heightened activity observed during periods of heavy rainfall.