Monitor lizards are lizards in the genus Varanus, the only extant genus in the family Varanidae. 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 crocodile is a large crocodilian native to freshwater habitats in Africa, where it is present in 26 countries. It is widely distributed in sub-Saharan Africa, occurring mostly in the eastern, southern, and central regions of the continent, and lives in different types of aquatic environments such as lakes, rivers, swamps and marshlands. It occasionally inhabits deltas and brackish lakes and rarely also saltwater. Its range once stretched from the Nile Delta throughout the Nile River. Lake Turkana in Kenya has one of the largest undisturbed Nile crocodile populations.
The Highveld is the portion of the South African inland plateau which has an altitude above roughly 1,500 m (4,900 ft), but below 2,100 m (6,900 ft), thus excluding the Lesotho mountain regions to the south-east of the Highveld. It is home to some of the country's most important commercial farming areas, as well as its largest concentration of metropolitan centres, especially the Gauteng conurbation, which accommodates one-third of South Africa's population.
The Nile monitor is a large member of the monitor family (Varanidae) found throughout most of Sub-Saharan Africa, particularly in drier regions, and along the Nile River and its tributaries in East Africa. Additionally, there are modern, invasive populations in North America. The population found in West African forests and savannahs is sometimes recognized as a separate species, the West African Nile monitor. While it is dwarfed by its larger relatives, such as the Komodo dragon, the Asian water monitor or the crocodile monitor, it is still one of the largest lizards in the world, reaching Australia’s perentie in 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 black tree monitor or Beccari's monitor is a species of lizard in the family Varanidae. The species is a relatively small member of the family, growing to about 90–120 cm (35–47 in) in total length. V. beccarii is endemic to the Aru Islands off New Guinea, living in an arboreal habitat. The skin color of adults is completely black, to which one common name refers.
The emerald tree monitor or green tree monitor, is a small to medium-sized arboreal monitor lizard. It is known for its unusual coloration, which consists of shades from green to turquoise, topped with dark, transversedorsal banding. This coloration helps camouflage it in its arboreal habitat. Its color also makes the emerald tree monitor highly prized in both the pet trade and zoos alike.
The dwarf crocodile, also known as the African dwarf crocodile, broad-snouted crocodile or bony crocodile, is an African crocodile that is also the smallest extant (living) species of crocodile.
The rock monitor is a species of monitor lizard in the family Varanidae. The species is endemic to sub-Saharan Africa, where, on average it is the largest lizard found on the continent. It is called leguaan or likkewaan in some areas.
The peach-throated monitor, also known as the Sepik monitor, is a species of monitor lizard native to New Guinea.
The ornate monitor is a monitor lizard that is native to West and Middle Africa. Comprehensive molecular analyses of the group have demonstrated that animals previously assigned to "Varanus ornatus" do not constitute a valid taxon and are actually polymorphisms of two different species; Varanus stellatus and Varanus niloticus. Consequently, Varanus ornatus is considered a synonym of Varanus niloticus and "ornate monitor" is an informal term for forest forms of either species . Until 1997, the ornate monitor was considered a subspecies of the Nile monitor. It was subsequently described as a separate species on the basis of reduced number of ocelli rows on the body, a light coloured tongue and a more massive build. More recent work based on a large sample size using mitochondrial and nuclear DNA sequences indicates that Varanus ornatus is not a valid species and that animals with the diagnostic appearance belong either of two sister species of Nile monitor. Animals described as ornate monitor lizards are native to closed canopy forests in West and Middle Africa.
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.
Varanus keithhornei, commonly known as the canopy goanna, Keith Horne's monitor, blue-nosed tree monitor, or Nesbit River monitor, is a species of monitor lizards native to northeast Australia. It is a member of the Varanus prasinus species group.
Finsch's monitor is a species of monitor lizard in the family Varanidae. The species is native to New Guinea and Australia.
Varanus macraei, the blue-spotted tree monitor or blue tree monitor, is a species of monitor lizard found on the island of Batanta in Indonesia. It is named after herpetologist Duncan R. MacRae, founder of the reptile park Rimba on Bali.
The West African crocodile, desert crocodile, or sacred crocodile is a species of crocodile related to, and often confused with, the larger and more aggressive Nile crocodile.
The Mussau Island blue-tailed monitor or Mussau monitor is a species of monitor lizard endemic to Mussau Island in Papua New Guinea. It belongs to the Varanus doreanus species complex.
Bogert's monitor is a species of tree-dwelling monitor lizard. The species is native to Papua New Guinea.
The Yuwono monitor or tricolor monitor, also commonly known as the black-backed mangrove monitor or the black-backed monitor, is a species of monitor lizard in the blue-tailed monitor species complex. The tricolor monitor is endemic to the island of Halmahera, in the Maluku Islands, Indonesia.
