List of largest extant lizards
Currently there are about 40 extant families of
New Caledonian giant gecko (Rhacodactylus leachianus), has a length of up to 36 cm (14 in), while the largest species in the family Varanidae, Komodo dragon
(Varanus komodoensis), has a length up to 3 metres (10 ft), and a body mass of 70 kg (154 lbs).
Largest extant lizards
Here are the 15 largest extant lizards based on the most reliable measurements for size, including length and weight. These include family types Varanidae, Iguanidae and Teiidae exceeding 9 kg (20 lbs) in mass.
Rank | Common name | Binomial name | Family | Maximum reliable or known mass kg (lb) |
Maximum total length m (ft) |
Image |
---|---|---|---|---|---|---|
1 | Komodo dragon | Varanus komodoensis | Varanidae | 166 (366) in captivity[1] 81.5 (180) caught in the wild, excluding stomach contents Probably 100 (220) including stomach contents[2][1][3] (see below) |
3.13 (10.27) in captivity | |
2 | Asian water monitor | Varanus salvator | Varanidae | 25 (55)[4][5] (see below) | 3.21 (10.53)[4] (see below) | |
3 | Crocodile monitor |
Varanus salvadorii | Varanidae | 20 (44.1)[1] (see below) | 2.55 (8.37) longest verified specimen, but unverified considerable larger[6][7] (see below) | |
4 | Nile monitor | Varanus niloticus | Varanidae | 20 (44.1) according to many sources (see below) | 2.43 (8.0) the longest specimen (see below) | |
5 | Perentie | Varanus giganteus | Varanidae | 20 (44.1) according to many sources (see below) | 2.44 (8.0) the longest specimen (see below) | |
6 | Black-throated monitor | Varanus albigularis microsticus | Varanidae | 27 (60)[8] | 2.1 (6.89)[8] | |
7 | Lace monitor | Varanus varius | Varanidae | 14 (30.87) more reliable[4][9] (see below) | 2.0 (6.55)[4][10][9] (see below) | |
8 | Blue iguana | Cyclura lewisi | Iguanidae | 14 (30.87)[11][12][13] | 1.5 (4.91)[11][12] | |
9 | Galapagos land iguana | Conolophus subcristatus | Iguanidae | 13 (28.66)[14][15] | 1.5 (4.91)[14][15] | |
10 | Marine iguana | Amblyrhynchus cristatus | Iguanidae | 12 (26.46)[16] | 1.4 (4.59)[17][18] | |
11 | Rhinoceros iguana
|
Cyclura cornuta | Iguanidae | 10 (22.05)[19] | 1.22 (4.0).[20] Probably 1.36 (4.46) |
|
12 | Green iguana | Iguana iguana | Iguanidae | 9.1 (20)[21] | 2.0 (6.55)[21] | |
13 | Northern Sierra Madre forest monitor | Varanus bitatawa | Varanidae | 9 (19.84)[22][23] | 1.8 (5.84)[22][23] | |
14 | Red tegu | Salvator rufescens | Teiidae | 9 (19.84)[24] | 1.4 (4.59)[24] | |
15 | Gray's monitor | Varanus olivaceus | Varanidae | 8.9 (19.62)[22][23] | 1.88 (6.16)[22][23] |
By families
Agamas (Agamidae)
- The largest representatives in this group are species in the genus Hydrosaurus, which often exceed 1 metre (3.3 ft) in length.[25]
- The largest species – Makassar salfin lizard (Hydrosaurus microlophus) and Sulawesi black salfin lizard (Hydrosaurus celebensis) growing a length of 1.2 (3.9 ft) and 1.13 m (3.7 ft) respectively.[25]
- A Philippine salfin lizard (Hydrosaurus pustulatus) and Amboina salfin lizard (Hydrosaurus amboinensis) (previously counts the largest species in this group), have a length of 1 m (3.3 ft).[25]
- The Australian water dragon (Intellagama lesueurii) and Chinese water dragon (Physignathus cocincinus) can also exceed this length.[26][27]
- The frilled lizard (Chlamydosaurus kingii) has length up to 85 cm (2.79 ft) and mass up to 870 g (1.92 lb),[28] probably even 900 g (2 lb)[29]
- Uromastyx aegyptia is one of heaviest representatives among agamas, with length up to 76 cm (30 in)[30] and mass 2 kg (4.4 lbs).[31]
- A central bearded dragon (Pogona vitticeps) and eastern bearded dragon (Pogona barbata) have a length of 60 cm (24 in),[32][33][34] and are the largest in their genus.[34]
American legless lizards (Anniellidae)
- The largest American legless lizards is the Californian legless lizards (Anniella pulchra) attaining 18 cm (7.1 in) long.
Glass lizards (Anguidae)
- Many representatives of this family are legless lizards. Among these the largest species, and also the largest legless lizard in the world, is the sheltopusik (Pseudopus apodus), reaching a maximum length of more 135 cm (4.43 ft) and a mass in 1.1 kg (2.4 lb).[35]
- The eastern glass lizard (Ophisaurus ventralis) and slender glass lizard (Ophisaurus attenuatus) may reach lengths of up to 108 cm (3.54 ft)[36] and 107 cm (3.51 ft)[37] respectively.
- However, this family also has lizards with legs, among which the largest is the Texas alligator lizard (Gerrhonotus infernalis) growing to from 45.7 cm (18 in) till 64 cm (25.2 in)[38][39] in different sources.
Chameleons (Chamaeleonidae)
- Of all chameleons, the largest is the Parson's chameleon (Calumma parsonii), reaching a length of 68 cm (27 in).[40][41] But the longest species is the Malagasy giant chameleon (Furcifer oustaleti). It has a length of up to 68.5 cm (27 in).[42]
- Other large chameleons are the veiled chameleon (Chameleo calyptratus) and Meller's chameleon (Trioceros melleri), with lengths of up to 61 cm (24 in)[43][44] Exceptionally large specimens of the latter have reputedly reached over 76 cm (30 in) and mass 600 g (1.3 lb), although this is unlikely.[45]
Spinytail lizards (Cordylidae)
- Many species in this family are small to medium-sized lizards that range in length from 6 to 30 cm (2.4 to 11.8 inches).[46] There are large species in the genus Smaug, the largest of which is a giant girdled lizard (Smaug giganteus), with snout-vent length up to 20.5 cm (8.07 in)[47] and total length up to roughly 40 cm (15.74 in).[48]
Casquehead lizards (Corytophanidae)
- Casquehead lizards are quite large lizards. In particular, the genus Basiliscus typically measures 70–75 cm (28–30 in).[49][50] But the largest species in this group is the plumed basilisk (Basiliscus plumifrons), frequently growing to 91 cm (36 in).[51]
- Another large species in this group is the eastern casquehead iguana (Laemanctus longipes) reaching up to 70 cm (27.6 in) including its long, thin tail.
Collared lizards (Crotaphytidae)
- In this reticulated collared lizard (Crotaphytus reticulatus) with length up to 41 cm (16 in)[citation needed] and mass 78.77 g (2.8 oz).[52]
Anoles (Dactyloidae)
- Large species in this group are usually crown giant
- However, in the equester species complex there are also species reaching the same length and even larger. These include A. baracoae, A. luteogularis, A. noblei and A. smallwoodi.[58][59][60][61]
Geckos (Gekkota)
- Species of
- Other representatives of the same genus as the aforementioned gecko can also reach huge sizes. These include
- A extant member of the genus
- There are also large species in the family Gekkonidae. These include tokay gecko (Gekko gekko), Smith's green-eyed gecko (Gekko smithii) and Andaman giant gecko (Gekko verreauxi), which can reach and even exceed 30 cm (12 in).[72][73][74]
- Another genus with large geckos is Uroplatus. The largest representative in this genus is the giant leaf-tail gecko (Uroplatus giganteus), which can reach a snout–vent length of 20 cm and a total length of 32.2 cm.[75] Another species that grows almost as large is the common flat-tail gecko (Uroplatus fimbriatus), which can exceed 30 cm (12 in) and more.[76]
- The genus Phelsuma in subfamily Uroplatinae also has large species. Standing's day gecko (Phelsuma standingi) is one of the largest day geckos, reaching a length of about 25.4 cm (10.0 in) and Round Island day gecko (Phelsuma guentheri), Madagascar giant day gecko (Phelsuma grandis) and Phelsuma madagascariensis can reach even more impressive lengths of 30 cm (12 in) or more.[77][78][79]
- Outside of the families Diplodactylidae and Gekkonidae, there are large geckoes among the Eublepharidae. The African fat-tailed gecko (Hemitheconyx caudicinctus) reaches a length of up to 23 cm (9.1 in),[80] and a mass of 75 g (2.6 oz).[81] The leopard gecko (Euplepharis macularis) reaches even large sizes – up to 28 cm (11 in) long with a mass of 60–80 g (2.1–2.84 oz).[82]
- The largest species of a SVL.[84]
Plated lizards (Gerrhosauridae)
- The largest species in this family is the giant plated lizard (Matobosaurus validus), with a total length of up to 69 cm (27 in)[85][86] or even 75 cm (29.5 in),[87] with a snout-vent length (SVL) of 28 cm (11 in).[85] Another large plated lizard is the Sudan plated lizard (Broadleysaurus major), with a length of about 51–60 cm (20–24 in).
Beaded lizards and Gila monster (Helodermatidae)
- This family includes large and stocky lizards, including the infamous snout-vent length (SVL) of 36 cm (14.1 in)[10] and a body mass from 1 kg (2.2 lb)[10] to 2.2 kg (4.9 lb)[citation needed] depending on the source. But despite the stocky and massive body of this lizard, it is not the largest representative of the family. Greatly exceeding it in size are the Mexican beaded lizard (Heloderma horridum) and Rio Fuerte beaded lizard (Heloderma exasperatum), with a total length of up to 91 cm (36 in),[10][88] a SVL of up to 47 cm (18.5 in)[10] and a mass from 2 kg (4.4 lb)[10] to 4 kg (8.8 lb)[89][90][88]depending on the source.
Iguanas (Iguanidae)
- Sauromalus is the San Esteban chuckwalla (Sauromalus varius), up to 76 cm (27 in) long and 1.4 kg (3.1 lb) in weight,[92] while the second-largest is the Angel Island chuckwalla (Sauromalus hispidus), up to 64 cm (25.2 in) long.[92]
- Many sources describe the green iguana (Iguana iguana) as the largest iguanid, often reaching lengths up to 1.5 metres (4.91 ft) and masses of 4 kg (8.8 lb),[93] and with a maximum length of 2 m (6.6 ft) and a mass of 8 kg (18 lb)[21][94] and in some cases even 9.1 kg (20 lb).[21] However, the heaviest species in this family is the blue iguana (Cyclura lewisi), with a total length of up to 1.5 m (4.91 ft), a SVL of 51–76 cm (30 in) and a mass of up to 14 kg (31 lb)[11][12] It is the eighth-heaviest and largest extant lizard.[13]
- Other large species in this family include the Galapagos pink land iguana (Conolophus marthae) have snout-vent length 57.5 cm (22.6 in) and the mass of 8 kg (18 lb).[95]
- The Galapagos Islands after the Galapagos land iguana, not including turtles reaching a maximum total length of 1.4 m (4.59 ft), a SVL of from 12 till 56 cm (from 4.72 till 22 in)[17][18] and a mass of from 1 to 12 kg (2.2 to 26.5 lb)[16]depending on islands.
- Aforementioned snout-vent length (SVL) of 56 cm (22 in)[96] and a mass 7.75 kg (17.1 lb).[97] A second largest species in this genus and second longest iguanid overall, and also one of the largest lizards in the Caribbean, the Cuban iguana (Cyclura nubila) reaching a length in 1.6 m (5.2 ft) with a SVL in 74.5 cm (29.3 in).[97]
- The Puerto-Rico.
- At least two subspecies (Cyclura cychlura cychlura and Cyclura cychlura inornata) of the Northern Bahamian rock iguana (Cyclura cychlura) can be over 1.5 m (4.9 ft) in length.[99][100][101][102]
- A member of the genus Iguana, lesser Antillean iguana (Iguana delicatissima) can reach SVL 43.4 cm (17.1 in), and mass 3.5 kg (7.7 lb).[103]
- The black iguana (Ctenosaura similis) and western spiny-tailed iguana (Ctenosaura pectinata) are the largest species in the genus Ctenosaura, reaching a length in 1.3 m (4.3 ft).[104] The longest is Mexican spiny-tailed iguana (Ctenosaura acanthura) with a length of 1.4 m (4.6 ft).[105]
True lizards (Lacertidae)
- This family includes 300 diverse species. Among the largest is Gran Canaria giant lizard (Gallotia stehlini), reaching a length of 80 cm (31 in),[106][107] with a SVL of 26.5 cm (10.4 in)[108] and a mass of almost 1.7 kg (3.7 lb).[109] A subspecies the same genus – El Hierro giant lizard (Gallotia simonyi machadoi), perhaps also is one of the largest lacertid, and able reach a length of 60 cm (24 in).[citation needed] A Tenerife lizard (Gallotia galloti) have a total length in 44 cm (17 in)[citation needed] and a SVL of 14.5 cm (5.7 in).[110] Another large lizard in this genus are La Gomera giant lizard (Gallotia brovoana), reaching a length of almost 50 cm (20 in) and a SVL in 19 cm (7.5 in)[111]
- Estimated to reaching the snout-vent length of 40–44 cm (16–17 in) and a mass in 5 kg (11 lb),[112] La Palma giant lizard (Gallotia auaritae) perhaps the largest living lacertid outsized even Gran Canaria giant lizard (Gallotia stehlini). However, on the other hand, it is very little data to confirm this, and therefore the aforementioned Gran Canaria giant lizardis usually considered the largest representative of its family.
- The longest member of this family is ocellated lizard (Timon lepidus), having a length of 90 cm (35 in),[113] with a SVL 26 cm (10 in)[114] and a mass 0.5 kg (18 oz).[115] A representative the same genus, the Moroccan eyed lizard (Timon tangitanus) can have a length of 70 cm (28 in),[citation needed] and is one of the longest members of this family.
- The European green lizard (Lacerta viridis), Iberian emerald lizard (Lacerta schreiberi) and western green lizard (Lacerta bilineata) can exceed a length 40 cm (16 in)[116] and more, and with a SVL at least 13 cm (5.1 in).[117] The largest species in this group is Balkan green lizard (Lacerta trilineata), reaching a length of 50 cm (20 in), and a SVL of 16 cm (6.3 in).[118]
Earless monitor lizards (Lanthanotidae)
- snout-vent length (SVL) of about 20 cm (8 in),[119] and a total length of about 40 cm (16 in).[120] The longest recorded in the wild had length in 44.1 cm (17.4 in).[121] A specimen collected in the 1960s had a total length of 51 cm (20 in),[122] and near the time of its death an individual kept at the Bronx Zoo from 1968 to 1976 had a total length of 47 cm (18.5 in) and weighed 209 g (7.4 oz), but it was highly obese.[123]
Curly-tailed lizards (Leiocephalidae)
- The largest curly tailed lizards Sceloporus, but with the tail usually curled upward, especially when the lizard is in a horizontal position on rocks or on the ground.[124]
Leiosaurids (Leiosauridae)
- The Largest ever Enyalius catenatus The body mass can be up to 38.66 g (1.364 oz). The species is reproduces sexually and is gonochoric.[125]
Liolaemids (Liolaemidae)
- Members of the genus L. orientalis (99.2 mm max. SVL), L. patriciaiturrae (96.5 mm max. SVL), L. puritamensis (90.8 mm max. SVL), L. robertoi (84 mm max. SVL), L. scrocchii (95 mm max. SVL) and L. stolzmanni (92 mm max. SVL).[126] The L. fabiani, L. filiorum, L. pachecoi, L. pleopholis, L. polystictus, L. robustus, L. thomasi, L. vallecurensis, L. vulcanus, and L. williamsi, L. austromendocinus, L. elongatus, L. gununakuna, L. petrophilus, and L. thermarum also may reach large sizes (around 10 cm)[127][128]
Madagascan iguanas (Opluridae)
- The biggest species of Madagascan iguanas is Madagascar spotted spiny-tailed iguana (Oplurus quadrimaculatus), it can reach a length of 25–39 centimetres (9.8–15.4 in).
Legless lizards (Pygopodidae)
- The largest legless lizard this family is the common scaly-foot (Pygopus lepidopodus) with a length of 70 cm (28 in),[129] a SVL of 24 cm (9.4 in)[130] with an weight of 225.95 g (7.970 oz)[131] and also the largest legless lizard in Australia[129] and biggest in the world overall, if don't counts some members the family Anguidae.
- Another large member is
Skinks (Scincidae)
- In this family very lot of species – about 1500. And many of species snout-vent length (SVL) in 12 cm (4.7 in). Although, the largest member of this family – Solomon Islands skink (Corucia zebrata) can grows the length of 81 cm (32 in),[136][137] a SVL in 35 cm (13.8 in) and a mass of 0.8–0.9 kg (1.8–2.0 lb).[138][139] But the heaviest is the common blue-tongued skink (Tiliqua scincoides) reaching a length in 60 cm (24 in),[140][141] a SVL of 36 cm (14.1 in)[142][140] and the mass of 1 kg (2.2 lb).[143]
- In the Scincidae after Solomon Islands skink. The large sizes also may reach blotched blue-tongued lizard (Tiliqua nigrolutea) with a length of 35–50 cm (14–20 in),[144] according to some information even 59.6 cm (23.5 in),[141] a SVL of 32 cm (13 in) and a mass of 0.8 kg (1.8 lb),[145] Centralian blue-tongued skink (Tiliqua multifasciata) exceeding in length of 45 cm (18 in)[141] with a SVL of 28.9 cm (11.4 in),[146] western blue-tongued lizard (Tiliqua occipitalis) with a length of 50 cm (20 in)[147] and a SVL of 30.7 cm (12.1 in),[146] probably 32 cm (13 in),[148] shingleback lizard (Tiliqua rugosa) with a total length of 41 cm (16 in),[149] a SVL of 26–31 cm (10–12 in)[150] and a mass of 0.6 to 0.9 kg (1.3 to 2.0 lb)[151] and a Irian Jaya blue tongue skink (Tiliqua sp.) with total length of 38–76 cm (15–30 in).[152]
- Previously considered of species in the Tiliqua is pink-tongued skink (Cyclodomorphus gerrardii) has a length of 45 cm (18 in)[153][154] and a SVL of 20 cm (7.9 in).[155]
- The land mullet (Bellatorias major) is one of the largest skinks and can reach a SVL of 16–31 cm (6.3–12.2 in)[156] with a total length of 60 cm (24 in).[157] The representative the same genus – the major skink (Bellatorias frerei) also grows large sizes – a total length in 42 cm (17 in) with a SVL of 18 cm (7.1 in)[158]
- The King's skink (Egernia kingii) is one of the longest skinks and can exceed a length of 55 cm (22 in)[143] with a SVL of 24.4 cm (9.6 in)[159] and weighing 220 g (7.8 oz).[citation needed] Other large skinks are Cunningham's spiny-tailed skink (Egernia cunninghami) and yakka skink (Egernia rugosa), both of which reach a length in 40 cm (16 in).[160][161]
- A representative of the genus Schneider's skink (Eumeces schneiderii) has a length of 36.5 cm (14.4 in) with a SVL in 16.5 cm (6.5 in).[162] Previously considered of species in the aforementioned genus – Kishinoue's giant skink (Plestiodon kishinouyei) is the largest species in its genus and may grows a length of 30–40 cm (12–16 in) with a SVL of 14.0–17.2 cm (5.5–6.8 in). Other large members in the genus Plestiodon are a broad-headed skink (Plestiodon laticeps) and a Great Plains skink (Plestiodon obsoletus) with a maximum length of 32.4 cm (12.8 in)[163] and 34.9 cm (13.7 in)[164] and a SVL 14.3 cm (5.6 in)[163] and 14 cm (5.5 in)[165]respectively.
- The genus legless or almost legless skinks. The largest among these are the Italian three-toed skink (Chalcides chalcides) and the western three-toed skink (Chalcides striatus) which have a length of 48 cm (19 in) and 43 cm (17 in)[166] respectively. In the genus Acontias also are limbless skinks many of which are quite small lizards, but the largest among these is giant legless skink (Acontias plumbeus) at approximately reaching 40 cm (16 in) in length.[167]
- The fire skink (Mochlus fernandi) is the largest member in its genus and also one of the largest African skinks, growing the length of 37 cm (15 in) and a SVL of 17 cm (6.7 in)[168]
- the largest extinct lizards) and was the biggest known skink of all time.
- The endangered skink and may reach 50 cm (20 in) in length[172] and 28 cm (11 in) in SVL[173][174] thus not only being one of the largest extant skinks, but the second biggest reptile on its island after monitor lizards, and so is an apex predator in its territory.[172]
Tegus and Teiids (Teiidae)
- Many teiids are quite small lizards. Although some members such as tegus are one of the biggest lizards in the world after monitor lizards and iguanas. The largest species this large family are Argentine black and white tegu (Salvator merianae) and red tegu (Salvator rufescens) attains more 1.2 m (3.9 ft) in a length and 6.8 kg (15 lb) in a mass. Argentine black and white tegu usually counts the largest species in its family with a length of 1.5 m (4.91 ft) and a mass of 7 kg (15 lb). Although, however, the red tegu, as more massive and bulky, can weigh more – the length is about 1.4 m (4.6 ft), and the weight is 9 kg (20 lb).[24]
- Both species of genus Dracaena, the northern caiman lizard (Dracaena guianensis) and the Paraguay caiman lizard (Dracaena paraguayensis), can have a length of 1.2 m (3.9 ft) and a mass in 4.5 kg (9.9 lb).[175]
- The largest member of the genus Tupinambis is the gold tegu (Tupinambis teguixin) with a maximum SVL in 40 cm (16 in).[176] Other large teiids this group are the cryptic golden tegu (Tupinambis cryptus) (maximum size: 391 mm (15.4 in) SVL with a 530 mm (21 in) tail), the Cusco tegu (Tupinambis cuzcoensis) (SVL of 247 mm (9.7 in) or larger) and the Maracaibo Basin tegu (Tupinambis zuliensis) (a 273 mm (10.7 in) SVL with a 537 mm (21.1 in) tail).[177]
Monitor lizards (Varanidae)
Body size in monitor lizards shows greater variation than in any other family of animalsmonitors occupy the first seven places.[13]
- Komodo dragon (Varanus komodoensis)
- The snakes like the green anaconda (up to 97.5 kg (215 lb) in the wild[181]) and the reticulated python (up to 150 kg (330 lb) in captivity[182]), but considering that these exceptionally large specimens are reported at a much lower frequency, it is still arguable that the Komodo dragon is the largest exant squamate on Earth.
- Asian water monitor (Varanus salvator)
- The nose-to-cloaca length of 59 cm (23 in) and a total length of 149.6 cm (4.91 ft).[184] Among these monitor lizards, some specimens weighed from 16–20 kg (35–44 lb). Another study in Sumatra by the same authors also estimates the weight of some specimens at 20 kg (44 lb)[185] while the average adult weight in the population is estimated to be about 7.6 kg (17 lb).[186]
- Crocodile monitor (Varanus salvadorii)
- The
- Nile monitor (Varanus niloticus)
- The crocodile monitor and competes with perentie.[1] In most cases, males of Nile monitors reach a total length of 150–170 cm (4.9-5.5 ft) and weigh in the region of 5–10 kg (11–22 lb),[191] while females are about 1.34 m (4.4 ft) long and weigh about 3 kg (6.6 lb). Exceptionally large wild specimens of the Nile monitors can probably reach about 2.5 meters (8.2 feet) in length and weigh about 20 kg (44 lb), making them one of the largest lizards in the world fauna.[1] In 1929, a photograph of a Nile monitor from South Africa was published, which was said to have reached a total length of 2.13 m (7.0 ft) and weighed almost 19 kg (42 lb).[192] The same author also reports that he shot another monitor lizard approximately 2.5 m (8.2 ft) long.[191] The largest animal this species reliably known to date reached a total length of 242 cm (7.94 ft) with a length from the muzzle to cloaca length 98 cm (39 in) and estimated at 12–15 kg (26–33 lb)[193] According to Faust (2001), the largest representative this species measured 2.43 m (7.97 ft).[1] A specimen with a length of 188 cm (6.17 ft) (length from tip of muzzle to cloaca is 74 cm (29 in)) was recorded from Orange Province in South Africa. Near Lake Chad, the maximum recorded size for a male is 2.07 m (6.8 ft) and for a female is 1.55 m (5.1 ft). The largest female Nile monitor for which there is reliable data reached 1.7 m (5.6 ft). Thus, it seems likely that in South Africa some specimens can reach lengths of 200 cm (6.6 ft) or more, but they are very rare.[191]
- Perentie (Varanus giganteus)
- The endemic to arid central Australia, found west of the Great Dividing Range. The largest individual recorded by (Stokes, 1846) measuring 2438 mm (8 ft) in total length.[1] However based on the vagueness of this account some authors claim Stokes' reported measurement of 2438 mm (8 ft) is exaggerated and a more likely maximum length may instead be 2.3 m (7.5 ft) (Stirling, 1912).[1] There have been larger individuals supposedly measuring more than 2.5 m (8.2 ft) in total length and 20 kg (44 lb) in mass reported but such claims remain unverified.[1] The maximum size of the perentie is probably not as great as many authors claim King & Green (1993) provide a useful discussion of size in this species. The longest found on Barrow Island by King et al. (1989) had a total length of 1.96 m (6.4 ft) with a SVL in 88 cm (35 in) and the heaviest weighed 11.7 kg (26 lb). Butler (1970) record s a specimen of 17 kg (37 lb) with a total length of 1.93 m (6.3 ft) from the same island.[1][194] Stokes (1846) records that two specimens collected on Barrow Island in 1840 had total lengths of 2.13 m (7.0 ft). Strimple (1988) suggested that one of these animals was the type specimen used by Gray, which has a total length of only 2.02 m (6.6 ft). Many perenties do not grow to such an enormous size, and the specimens on Barrow Island may grow larger than the main population. The limited data available suggests that females reach a smaller maximum size than males, rarely exceeding 1.4 m (4.6 ft) TL. Bredl (1987) records males of 1.8 and 1.9 m (5 ft 11 in and 6 ft 3 in) TL, and a female of 1.3 m (4.3 ft) TL. It appears that perenties approaching 2 m (6.6 ft) in length are the exception rather than the rule, and that in general few specimens grow larger than 1.5 m (4.91 ft). If specimens of 2.4 m (7.9 ft) or more have ever existed, none seem to have survived to the present.[194][195]
- Black-throated monitor (Varanus albigularis microstictus)
- The black-throated monitor (Varanus albigularis microstictus) is a subspecies of rock monitor (Varanus albigularis) and, perhaps, the heaviest lizard in Africa. Although, little information is available on the size of this species of monitor lizards. According to many information black-throated monitor attains 2.1 m (6.89 ft) in length and 27 kg (60 lb) in mass.[8][196][197] However, unknown whether this mass is reached in captivity or in the wild. By another – black-throated monitor has a mass of 23 kg (51 lb).[198] However, specimens 2.13 m (7.0 ft) for this species rock monitor was recorded.[195][199]
- Lace monitor (Varanus varius)
- The Victoria measured 75 cm (30 in) SVL, 192 cm (6.30 ft) TL and weighed 14 kg (31 lb).[9] Another from Healesville was 192 cm (6.30 ft) long and weighed almost 20.5 kg (45 lb).[9] It was found to have eaten four foxcubs, three young rabbits and three large blue-tongued skinks,[9] and all this was taken into account when weighing, is unknown. And, accordingly, the most commonly used maximum size for this species is a length of 192 cm (6.30 ft) and a weight of 14 kg (31 lb) for the previously mentioned specimen.[4][10][13] In conu'ast, a large male in the spring measured 1,5 m (4.91 ft) TL and weighed 4.2 kg (9.3 lb). Males grow larger than females and probably have larger home ranges.[9]
In the genus
Subgenus Empagusia
- The largest representative of the Empagusia is Bengal monitor (Varanus bengalensis) with a length in 1.75 m (5.7 ft) and a SVL of 75 cm (30 in), a mass of 7.2 kg (16 lb),[200] and in captivity even more – 10.2 kg (22 lb).[201] However, in average much less – 1,5 m (4.91 ft) in a length and 2.7 kg (6.0 lb) in a mass.[10][202] Even so, by some reports it grows much larger.[10][202][195]
- Another large species of this group are the clouded monitor (Varanus nebulosus) with a length of 1.5 m (4.91 ft) and a SVL of 60 cm (24 in),[203] the roughneck monitor (Varanus rudicollis), which has a total length of 1.46 m (4.8 ft), a SVL of 59 cm (23 in) with a mass of 4 kg (8.8 lb),[195][204] the Dumeril's monitor (Varanus dumerilii) (Maximum size is about 135 cm (4.43 ft) TL. A breeding pair maintained in captivity measured 130 cm (4.3 ft) TL, 2,950 g (6.50 lb) (male) and 100 cm (3.3 ft), 2,300 g (5.1 lb) (female). Wild animals of 30 cm (12 in) SVL weigh about 1 kg (2.2 lb))[10][195][205] and the yellow monitor (Varanus flavescens) with a maximum length of 95.2 cm (3.12 ft), a SVL of 44.8 cm (17.6 in)[4] and a mass of 1,040 g (2.29 lb).[195][206]
Subgenus Euprepiosaurus
- The largest members of this subgenus are the mangrove monitor (Varanus indicus) and its close relatives with a total length of 1.5 m (4.91 ft)[4][195][207] (The largest Mariana monitors (Varanus tsukamotoi) found on Guam were 58 cm (23 in) for male and 44 cm (17 in) for female in SVL with wrights of 1,900 g (4.2 lb) and 500 g (1.1 lb) in weight respectively),[10][195][207] the Rainer Günther's monitor (Varanus rainerguentheri) with a maximum total length of 1.33 m (4.4 ft), probably even 1.5 m (4.91 ft),[208][4] the tricolor monitor (Varanus yuwonoi) having the maximum length of 1.46 m (4.8 ft),[208] the blue-tailed monitor (Varanus doreanus) exceeding 1.35 m (4.4 ft) long,[10] the Rennell Island monitor (Varanus juxtindicus) reaching 1.33 m (4.4 ft) in length[10] and the New Ireland monitor (Varanus douarrha) growing the length in 1.33 m (4.4 ft).[4]
- Other large lizards in this group include the quince monitor (Varanus melinus) (maximum length of 1.28 m (4.2 ft)),[209] the peach-throated monitor (Varanus jobiensis) (a total length of 1.2 m (3.9 ft) and a SVL of 45 cm (18 in)),[210] the Mussau Island blue-tailed monitor (Varanus semotus) (a total length of 1.2 m (3.9 ft) and a SVL of 48 cm (19 in))[4] and the sago monitor (Varanus obor) (a total length of 1.13 m (3.7 ft) and a SVL of 44 cm (17 in)).[4]
Subgenus Hapturosaurus
- The largest snout-vent length,[211] the black tree monitor (Varanus beccarii) with a maximum size of 34 cm (13 in) SVL, 94.5 cm (3.10 ft) total length[212] and the Bogert's monitor (Varanus bogerti) measuring a length in 94 cm (3.08 ft) with a SVL of 32 cm (13 in).[4]
Subgenus Odatria
- Whilst, in this subgenus have a lot of species, they are the smallest monitor lizards.[4] In its include Dampier Peninsula monitor (Varanus sparnus) – the smallest monitor with a length of 227 mm (8.9 in), a SVL of 116 mm (4.6 in) and a mass of 16.3 g (0.57 oz).[4]
- The largest species in this subgenus is the black-palmed rock monitor (Varanus glebopalma) measuring the maximum size of 397 mm (15.6 in) and 1.1 m (3.6 ft) for SVL and total length respectively (an average mass constitute 240 g (8.5 oz) with a SVL of 290 mm (11 in), for the max.size much higher).[10] Another big member this group is Mitchell's water monitor (Varanus mitchelli), which may grow a length in 60–96 cm (1.97–3.15 ft)[213] with a SVL in 22–32 cm (8.7–12.6 in).[10]
Subgenus Papusaurus
- The only species crocodile monitor(Varanus salvadorii) (see higher).
Subgenus Philippinosaurus
- This are large frugivorous monitor lizards (175 cm (5.74 ft) long or more with a mass in >8 kg (18 lb)).[22] The Northern Sierra Madre forest monitor (Varanus bitatawa) with a maximum size instead be 180 cm (5.9 ft) in length and 9 kg (20 lb) in mass, the Gray's monitor (Varanus olivaceus), the biggest individual of which was just 188 cm (6.17 ft) long and a mass of 8.9 kg (20 lb) and the Panay monitor (Varanus mabitang) with the largest specimen which had a length of 175 cm (5.74 ft) and a mass in 8 kg (18 lb),[22][23] are one of the biggest lizards in the world. They measuring of 76.6 cm (30.2 in), 73 cm (29 in) and 70 cm (28 in) SVL respectively.[23]
Subgenus Polydaedalus
- The largest species Polydaedalus are the nile monitor (Varanus niloticus) and the black-throated monitor (Varanus albigularis microstictus) (see higher).
- Another large member of African monitors is a rock monitor, and to be more precise, its type species – white-throated monitor (Varanus albigularis albigularis) with a maximum length of 2 m (6.6 ft) and 15–17 kg (33–37 lb)[214] and an average size of 0.8–1.5 m (2.6–4.9 ft) in length and 3.2–5 kg (7.1–11.0 lb) for females and 6–8 kg (13–18 lb) for males in mass[215][216][217] by some sources. But, however, according to others even mass in 7.7 kg (17 lb) is a very rarely.[195][199]
- Although, large sizes may reach also other members of
- The ornate monitor can attains the length of 2 m (6.6 ft),[4] however, the ornate monitor is not currently considered a separate species, but is merely a polymorphisms of two different species.[219]
Subgenus Psammosaurus
- The subgenus Psammosaurus includes in its a large lizards and medium by size monitor lizards, growing the length of don't less 120 cm (3.9 ft).[4] The hugest member this little group and also, the largest lizard in Central Asia – desert monitor (Varanus griseus) specifically, Caspian monitor (Varanus griseus caspius) with a max.total length of 1.4 m (4.6 ft), a SVL of 58.5 cm (23.0 in) and a mass of 2,850 g (6.28 lb) and a SVL of 46 cm (18 in) with a mass in 2,700 g (6.0 lb) for longest and heaviest males and females respectively.[195][220] The Nesterov's desert monitor (Varanus nesterovi) also quite large monitor attaining 1.2 m (3.9 ft) in a length and 50 cm (20 in) in a SVL.[4]
Subgenus Solomonosaurus
- The Solomon Island spiny monitor (Varanus spinulosus) is a species of subgenus Solomonosaurus, with a maximum reliable length and mass in captivity of 1 m (3.3 ft) (SVL 31 cm (12 in)) and 841 g (29.7 oz) respectively.[10]
Subgenus Soterosaurus
- The largest Soterosaurus is an Asian water monitor (Varanus salvator) (see higher).
- Second hugest after Asian water monitor are the marbled water monitor (Varanus marmoratus) and the Palawan water monitor (Varanus palawanensis) with a total length of almost 2 m (6.6 ft) (SVL of last one measuring 78.8 cm (31.0 in)).[4][221][222] By the data marbled water monitor can weighing about 7.2 kg (16 lb),[10] although, since V. palawanensis was previously considered a subspecies of V. marmoratus, which species this weight referred to is unknown.[222]
- Even medium-sized monitors this subgenus are quite large. For example, the yellow-headed water monitor (Varanus cumingi) and the large-scaled water monitor (Varanus nuchalis) with maximum length of 1.5 m (4.9 ft) and 1.45 m (4.8 ft), a SVL of 60 cm (24 in) and 53 cm (21 in) and 2.5 kg (5.5 lb) and 2.8 kg (6.2 lb) in max.mass respectively.[4][10] Also they include the Togian water monitor (Varanus togianus) (1.5 m (4.9 ft) in TL and 65 cm (26 in) in SVL), the Samar water monitor (Varanus samarensis) (1.4 m (4.6 ft) long with 53 cm (21 in) SVL), the Rasmussen's water monitor (Varanus rasmusseni) (1.21 m (4.0 ft) in length and SVL 46.6 cm (18.3 in)) and the Enteng's monitor lizard (Varanus dalubhasa) (1.16 m (3.8 ft) long and 50.5 cm (19.9 in) in SVL).[4]
Subgenus Varanus
- The largest members of this group are the Komodo dragon (Varanus komodoensis), perentie (Varanus giganteus) and lace monitor (Varanus varius) (see higher).
- After their, next place occupies the yellow-spotted monitor or Argus monitor (Varanus panoptes), which also is third biggest lizard in Australia, with a maximum length of 1.6 m (5.2 ft) (SVL of 74 cm (29 in)) and mass of 7 kg (15 lb),[4][10] although in captivity huge individuals can weigh about 10 kg (22 lb) and even more.[223]
- A close relative of the aforementioned species is Gould's monitor (Varanus gouldii), also attains large sizes — exclusively large specimens measuring length of 1.55 m (5.1 ft) (SVL of 67 cm (26 in)) with a mass of 5 kg (11 lb).[195][224] The Rosenberg's monitor (Varanus rosenbergi) grows 1.5 m (4.9 ft) long,[195][225] probably 1.6 m (5.2 ft) with a SVL of 70 cm (28 in).[4]
- Albeit, not as long as some other species of large varanids, the Spencer's monitor (Varanus spenceri) can weigh a very large for its length due to its massive and bulky body, and has a length of 1.2 m (3.9 ft) (SVL of 55 cm (22 in)) and mass of from 2.25 kg (5.0 lb)[195][226] till 6 kg (13 lb)[4][10] depending on sources.
- The smallest representative of this genus is the Mertens' water monitor (Varanus mertensi) with a length of 1.3 m (4.3 ft) (SVL of 48 cm (19 in)).[4] Though, not as bulky as some other species of monitor lizards, in captivity, it can weigh up to 4.9 kg (11 lb).[195][227]
Night lizards (Xantusidae)
- The largest night lizard is the yellow-spotted tropical night lizard (Lepidophylum flavimaculatum) which attains a snout-to-vent length (SVL) of 12.69 cm (5.00 in) with a tail 1/3 times exceeding the body length.
Knob-scaled lizards (Xenosauridae)
- The largest xenosaurid is a knob-scaled lizard (Xenosaurus grandis) with a snout-vent length of 12.9 cm (5.1 in) and a total length of 24 cm (9.4 in).[228]
See also
- Megalania – the largest land lizard to have ever lived
- which includes the largest lizards of the world
- List of largest reptiles
- List of largest snakes
- List of largest extinct lizards
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{{cite book}}
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