Monitor lizards are large lizards in the genus Varanus. They are native to Africa, Asia, and Oceania, and one species is also found in the Americas as an invasive species. About 80 species are recognized.
The Nile monitor is a large member of the monitor family (Varanidae) found throughout most of Sub-Saharan Africa and along the Nile. The population in West African forests and savannahs is sometimes recognized as a separate species, the West African Nile monitor. It is one of the largest lizards in the world reaching and even surpassing the perentie by size. Other common names include the African small-grain lizard, as well as iguana and various forms derived from it, such as guana, water leguaan or river leguaan,
The Bengal monitor or common Indian monitor is a monitor lizard distributed widely in the Indian Subcontinent, as well as parts of Southeast Asia and West Asia. This large lizard is mainly a terrestrial animal, and its length ranges from about 61 to 175 cm from the tip of the snout to the end of the tail. Young monitors may be more arboreal, but adults mainly hunt on the ground, preying mainly on arthropods, but also taking small terrestrial vertebrates, ground birds, eggs and fish. Although large Bengal monitors have few predators apart from humans who hunt them for meat, younger individuals are hunted by many predators.
The Asian water monitor is a large varanid lizard native to South and Southeast Asia. It is one of the most common monitor lizards in Asia, ranging from coastal northeast India, Sri Lanka, mainland Southeast Asia to Indonesian islands where it lives close to water. It is listed as Least Concern on the IUCN Red List. It was described by Laurenti in 1768 and is among the largest squamates in the world.
The savannah monitor is a medium-sized species of monitor lizard native to Africa. The species is known as Bosc's monitor in Europe, since French scientist Louis Bosc first described the species. It belongs to the subgenus Polydaedalus.
The yellow-spotted monitor, also known as the Argus monitor, is a monitor lizard found in northern and western regions of Australia and southern New Guinea.
The spiny-tailed monitor, also known as the Australian spiny-tailed monitor, the ridge-tailed monitor or Ackie's dwarf monitor, is an Australian species of lizard belonging to the genus of monitor lizards (Varanus).
The Gray's monitor is a large 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 Northern Sierra Madre monitor lizard was thought to be of same species with Gray's monitor until a research concluded in 2010 that northern populations of Gray's monitor was a distinct species, now known as V. bitatawa.
Mertens' water monitor, also called commonly Mertens's water monitor, and often misspelled Mertin's water monitor, is a species of lizard in the family Varanidae. The species is endemic to northern Australia, and is a wide-ranging, actively foraging, opportunistic predator of aquatic and riparian habitats. It is named after German herpetologist Robert Mertens.
The pygmy mulga monitor, also known as Gillen's monitor or just mulga monitor is a species of lizard in the family Varanidae.
The Kimberley rock monitor is a medium-sized species of monitor lizard in the family Varanidae. The species is native to Northern Australia. Also known as Glauert's monitor or the Kakadu sand goanna, it belongs to the subgenus Odatria.
The turquoise monitor is a species of monitor lizards found in Indonesia. Specifically, it is found on Halmahera Island and in the Maluku Islands.
The blue-tailed monitor, blue-tailed tree monitor or Kalabeck's monitor, is a monitor lizard of the Varanidae family. It belongs to the V. doreanus group of the subgenus Euprepiosaurus.
Dumeril's monitor is a species of lizard, endemic to Southeast Asia. It is a member of the family Varanidae.
The Rennell Island monitor is a species of monitor lizards found in the Solomon Islands archipelago. It is also known as the Hakoi Monitor. It belongs to the subgenus Euprepiosaurus along with the canopy goanna, the peach-throated monitor, Kalabeck's monitor, and others.
The quince monitor is a species of monitor lizards endemic to Indonesia. It is very closely related to the mangrove monitor, with both belonging to the subgenus Euprepiosaurus.
Mitchell's water monitor is a semiaquatic species of monitor lizard in the family Varanidae. The species is native to Australia.
Varanus scalaris is a small species of monitor lizard. It is often referred to as the banded tree monitor or the spotted tree monitor.
The rusty monitor is a small species of monitor lizard.
The Togian water monitor is a species of monitor lizard.
