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The black rough-necked monitor (V. rudicollis) was previously in the closely related subgenus Empagusia, but genomic analyses show it is actually the basalmost member of Soterosaurus, having split from the V. salvator species complex (which is composed of all the other Southeast Asian water monitor species) 14 million years ago during the middle Miocene.
A sample of 55 Asian water monitors weighed 2–32 kg (4.4–70.5 lb). [11] The maximum weight of captive individuals is over 50 kg (110 lb). [12] In captivity, Asian water monitors' life expectancy has been determined to be anywhere between 11 and 25 years depending on conditions, in the wild it is considerably shorter. [13] [14]
Mertens' water monitor (Varanus mertensi), often misspelled Mertin's water monitor, is a species of monitor lizard. The species is endemic to northern Australia, and is a wide-ranging, actively foraging, opportunistic predator of aquatic and riparian habitats. [2] It is named after German herpetologist Robert Mertens. [3]
Other common names include the African small-grain lizard, [4] as well as iguana and various forms derived from it, [5] such as guana, water leguaan [6] or river leguaan (leguan, leguaan, and likkewaan mean monitor lizard in South African English, and can be used interchangeably).
Perenties can grow to lengths of 2.5 m (8 ft 2 in) and weigh up to 20 kg (44 lb), possibly up to 3 m (9 ft 10 in) and 40 kg (88 lb), making it the fourth-largest extant species of lizard (exceeded in size only by the Komodo dragon, Asian water monitor and crocodile monitor).
V. cumingi has the highest degree of yellow coloration among all the endemic water monitors in the Philippines. The V. cumingi is a large lizard and medium-sized monitor lizard. The largest specimens its species can reaching a length of 1.5 m (4 ft 11 in) with a snout-vent length of 60 cm (24 in) and 2.5 kg (5.5 lb) in a mass.
The black-headed monitor or black-tailed monitor (Varanus tristis) is a relatively small species of monitor lizards native to Australia. It is occasionally also called the mournful monitor , freckled monitor ( Varanus tristis orientalis ) or the racehorse monitor , [ 2 ] a name it shares with the Gould's monitor due to their exceptional speed.
Hydrosaurus, commonly known as the sailfin dragons or sailfin lizards, is a genus in the family Agamidae. [2] These relatively large lizards are named after the sail-like structure on their tails. They are native to Indonesia (four species) and the Philippines (one species), where they are generally found near water, such as rivers and mangrove ...