
Source: Wikimedia Commons
Varanus dumerilii
A monitor endemic to evergreen forest and mangrove swamp in South-East Asia. Terrestrial to semi-aquatic, it has been recorded submerged for up to 75 minutes, and it both burrows and climbs well, sometimes even sleeping in water.
Varanus dumerilii is a varanid lizard endemic to South-East Asia. Its specific name honours the French zoologist André Marie Constant Duméril, and it belongs to the subgenus Empagusia. It reaches about 1.2 m, making it a medium-sized monitor; hatchlings have a snout-vent length of about 8 cm with a tail slightly longer than that. It lives in dense evergreen forest with high humidity and in mangrove swamp, from sea level to 900 m. Terrestrial to semi-aquatic, it has been recorded remaining submerged for up to 75 minutes and frequently soaks, swims and even sleeps in water. It is an accomplished burrower as well as a climber, so captives need both branches and diggable substrate. In the wild it feeds on insects, snails, crabs, frogs and fish, and in captivity it also accepts shellfish and rodents. The subspecies heteropholis was described historically, but Sprackland (1993) examined material including the holotypes of both forms and treated it as a synonym of the nominate subspecies. The IUCN assesses the species as Data Deficient.
Source: Wikipedia (CC BY-SA 4.0)
The Dumeril's Monitor lives 15-20 years.
The Dumeril's Monitor grows to Up to about 1.2m; hatchlings have a snout-vent length of about 8cm.
Origin
Peninsular Thailand, Myanmar, western Malaysia, Singapore and Indonesia including Sumatra, Borneo, Bangka and Kalimantan, from sea level to 900 m
Lifespan
15-20 years
Sources: Reptiles Magazine: Dumeril's Monitor / Reptiles Magazine: The Monitor Lizard Foursome For Expert Keepers / Wikipedia (English) / Reptile Database
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Accepted name: Varanus dumerilii Schlegel, 1839
Synonyms: Varanus dumerili heteropholis Boulenger, 1892, Varanus macrolepis Blanford, 1881
Authority databases: GBIF · Reptile Database
Nomenclature follows global taxonomic authority databases.
Varanidae spp. are listed in CITES Appendix II. Because of Appendix II listing, an international CITES registration certificate is not required, but an export permit issued by the exporting country is necessary for importation. In Japan, only 2 species of Varanidae are designated as Specified Animals; this species is not included. It does not fall under Designated Invasive Species under the Invasive Species Act.
Sources: CITES Appendices (Varanidae spp., Appendix II) / IUCN Red List
Regulations may change. Always verify the latest information with the relevant authorities.
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Size
Up to about 1.2m; hatchlings have a snout-vent length of about 8cm
Humidity
40〜70%
Insects, snails, crabs, frogs and fish; in captivity it also takes shellfish and rodents
Hold ambient temperatures at 28-32C with a basking spot up to about 35-36C, dropping to 21-24C at night, and always provide a gradient. As a species of humid evergreen forest and mangrove swamp it must not be kept dry.
Being semi-aquatic it must have a large water container it can soak and swim in. It both burrows and climbs, so provide substrate deep enough to dig in as well as branches for climbing and basking, plus several shelters.
In the wild it feeds on insects, snails, crabs, frogs and fish. In captivity it will also accept various shellfish and rodents. Offer a varied diet with calcium supplementation.
It is considered relatively calm for a medium-sized monitor, but it is strong and sharp-clawed, and it is kept singly. It spends long periods in water, so poor water quality readily leads to skin problems.
Varanidae spp. are listed on CITES Appendix II, so import requires an export permit; no Japanese registration certificate is needed for Appendix II. Of the varanids, only the Komodo dragon and the crocodile monitor are specified animals under Japanese law, and this species is not among them. The IUCN assesses it as Data Deficient, so even its population status is unestablished; confirm the origin of any animal you acquire.
Advanced. This is an advanced-level species. It requires specialized equipment and advanced husbandry skills with precise environmental control.
The average lifespan of Dumeril's Monitor is 15-20 years. With proper care and nutrition, they can live a long and healthy life.
Dumeril's Monitor typically reaches Up to about 1.2m; hatchlings have a snout-vent length of about 8cm as an adult. Size may vary depending on care conditions and individual genetics.
Dumeril's Monitor feeds on: Insects, snails, crabs, frogs and fish; in captivity it also takes shellfish and rodents. Aim for a balanced diet with appropriate feeding frequency.
The price of Dumeril's Monitor varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 28, 2026