Asian water monitor
| Asian water monitor ： ウィキペディア英語版|
:''For the Australian species with similar common names, see Mertens' water monitor and Mitchell's water monitor.''
The water monitor (''Varanus salvator'') is a large lizard native to South and Southeast Asia. Water monitors are one of the most common monitor lizards found throughout Asia, and range from Sri Lanka and India to Indochina, the Malay Peninsula, and various islands of Indonesia, living in areas close to water.
The species can survive where other large carnivores cannot, as they are very omnivorous and cold-blooded (hence efficient). The species is known as Malayan water monitor, Asian water monitor, common water monitor, two-banded monitor, and as rice lizard, ring lizard, plain lizard and no-mark lizard, as well as simply "water monitor".
== Description ==
The water monitor is a large species of monitor lizard. Breeding maturity is attained for males when they are a relatively modest long and weigh , and for females at . However, they grow much larger throughout life, with males being larger than females. Adults rarely exceed in length,〔Pianka, King & king. Varanoid lizards of the world. 2004〕 but the largest specimen on record, from Sri Lanka, measured . A common mature weight of ''V. salvator'' can be .〔〔(Water Monitor Lizard (Varanus salvator) at Pak Lah’s House | Mutakhir ). Wildlife.gov.my (2012-02-23). Retrieved on 2012-08-22.〕 However, 80 males killed for the leather trade in Sumatra averaged only and snout-to-vent and in total length; 42 females averaged only and snout-to-vent and in total length,〔Shine, R., Harlow, P. S., & Keogh, J. S. (1996). Commercial harvesting of giant lizards: The biology of water monitors'' Varanus salvator'' in southern Sumatra. Biological Conservation, 77(2), 125-134.〕 although unskinned outsized specimens weighed . Another study from the same area by the same authors similarly estimated mean body mass for mature specimens at 〔Shine, R., & Harlow, P. S. (1998). ''Ecological traits of commercially harvested water monitors, Varanus salvator, in northern Sumatra''. Wildlife Research, 25(4), 437-447.〕 while yet another study found a series of adults to weigh . The maximum weight of the species is over .〔(Water Monitor – Varanus salvator : WAZA : World Association of Zoos and Aquariums ). WAZA. Retrieved on 2012-08-22.〕 In exceptional cases, the species has been reported to attain , though most such reports are unverified and may be unreliable. They are the world's second-heaviest lizard, after the Komodo dragon.〔 Their bodies are muscular, with long, powerful, laterally compressed tails.
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