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Quince Monitor
Varanus melinus
A stunning, arboreal Indonesian monitor lizard known for its bright quince-yellow coloration. Requires a massive enclosure, high humidity levels, and a large heated water basin.
Class:Squamata
Order:Squamata
Family:Varanidae
Genus:Varanus
Species:Varanus melinus
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Environment
Terrestrial
Humidity
75 - 90 %
Day temperature
28 - 30 °C
Ambient temperature
28 °C
Night temperature
22 - 24 °C
Basking spot
42 - 45 °C
Adult size
51 cm
Minimum enclosure
>= 3,000 L
UVB
Medium
Species description
Geographical Origin and Habitat: Endemic to the Sula Islands (including Mangole, Sanana, and Taliabu) and the western Moluccas in Indonesia. It primarily inhabits lowland primary and secondary tropical rainforests, swamp forests, and forested areas adjacent to freshwater streams. It is a highly arboreal species that spends most of its life in the canopy of tall trees, only descending to the ground or entering the water to hunt or travel.
Taxonomy and Genetics: Described scientifically in 1997 by Böhme and Ziegler, this species belongs to the family Varanidae, genus Varanus, and subgenus Euprepiosaurus. It is a member of the Varanus indicus (mangrove monitor) species complex. Genetically, it shares close evolutionary ties with Varanus indicus and Varanus yuwonoi, but is clearly distinguished by its stable morphological and chromatic traits.
Behavior and Habits: Diurnal, highly alert, and extremely active. In the wild, it is shy, retreating into the high canopy or diving into water when threatened. In captivity, it can develop curious and exploratory behaviors if housed in a quiet, stress-free environment. It requires experienced handling as it can whip its tail defensively or bite if cornered.
Morphology: Features a spectacular bright quince-yellow ground color, adorned with black reticulations or ocelated patterns on its back, which may fade or become more defined as the animal matures. The head, neck, and upper limbs are bright yellow. It reaches a total length of 80 to 120 cm, with the tail being laterally compressed with a double dorsal keel, serving as a powerful tool for swimming and climbing.
Care, breeding and tankmates
Terrarium Setup: Due to its size and arboreal nature, a monumental enclosure is required. The minimum size for an adult is 200x100x200 cm (80x40x80 inches). Provide sturdy, securely anchored branches, elevated basking shelves, and a large heated water pool covering at least 30% of the floor space to allow complete soaking and swimming, as they prefer to defecate in water.
Lighting and Heating: A strict thermal gradient must be maintained. Ambient daytime temperature should be between 28°C and 32°C (82-90°F), with a localized basking spot reaching 45-50°C (113-122°F) under heat lamps. Nighttime temperatures should not drop below 22°C (72°F). High-output UVB lamps (10.0) are mandatory and should be active for 12 hours a day to prevent metabolic issues.
Humidity and Hydration: Requires a constant relative humidity of 70% to 85%. This can be achieved by misting warm water twice daily or installing an automatic misting system. The substrate should be deep and loose, composed of coconut husk, peat moss, and sphagnum to retain moisture. Water in the pool must be filtered or changed daily.
Feeding and Supplementation: A varied and balanced carnivorous diet is essential. Feed on crickets, dubia roaches, locusts, earthworms, snails, quail eggs, shrimp, small freshwater fish, and occasional appropriately sized mice (feed rodents sparingly to prevent obesity). Dust insects with pure calcium carbonate at every feeding for juveniles and 2-3 times weekly for adults, adding D3 once a week.
Compatibility: Strictly solitary animal. Due to territorial behavior and the risk of severe injury or cannibalism, keep individuals separate. Co-housing a pair should only be attempted by highly experienced breeders in massive zoo-style enclosures during the breeding season under close supervision.
Health and Common Diseases: Highly prone to metabolic bone disease (MBD) if adequate UVB lighting or calcium supplementation is lacking. Respiratory infections can occur if temperatures drop too low in humid conditions. Facial abrasions from rubbing against enclosure walls are common in stressed animals, as are impactions from ingesting inappropriate loose substrates.
Geographic Origin and Distribution
Endemic to the Sula Islands (including Mangole, Sanana, and Taliabu) and the western Moluccas in Indonesia. It primarily inhabits lowland primary and secondary tropical rainforests, swamp forests, and forested areas adjacent to freshwater streams. It is a highly arboreal species that spends most of its life in the canopy of tall trees, only descending to the ground or entering the water to hunt or travel.
Origin
South and Southeast Asia
Reptile profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- 51 cm
- Lifestyle/Microhabitat
- No verified data available
- Activity cycle
- No verified data available
- Sociality
- No verified data available
- Reproduction
- No verified data available
- Handling tolerance
- No verified data available
- Brumation
- No verified data available
- Molting
- No verified data available
The catalog's scalar value is 51 cm. The ReptTraits v1.2 source reports a maximum adult measurement of 51 cm for this species, recorded as snout–vent length (SVL). These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
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