At a glance: A bearded komodo dragon does not exist. The bearded dragon (Pogona vitticeps) is a small Australian lizard of 13 to 24 inches. The Komodo dragon (Varanus komodoensis) is an Indonesian monitor that can pass 10 feet and 300 pounds, and only the bearded dragon is a pet.
The phrase bearded komodo dragon mixes up two unrelated lizards that share only the word “dragon.” The bearded dragon lives in the deserts and scrub of Australia. The Komodo dragon is the largest lizard alive, and the two belong to different genera, Pogona and Varanus.
This page compares the two side by side on size, range, diet, venom, conservation and suitability as a pet. For the wider comparison with other reptiles, see the bearded dragon versus other lizards overview.
Is a Komodo dragon a bearded lizard?
No. Pogona is the bearded dragon genus, named for the spiny throat pouch that darkens and puffs out during displays. Varanus is the monitor lizard genus, and the Komodo dragon is its largest member.
The confusion comes from the shared common name. Neither animal is a small version of the other. A bearded dragon will never grow into a Komodo dragon, since it reaches 13 to 24 inches including the tail according to Animal Diversity Web.
Bearded dragon vs Komodo dragon: side by side
The table below labels each fact by species. Where sources disagree, both figures are given.
The Komodo climate figures describe its wild habitat as reported by the San Diego Zoo, not a captive husbandry standard, since no zoo husbandry manual was opened for this page.
| Trait | Bearded dragon (P. vitticeps) | Komodo dragon (V. komodoensis) |
|---|---|---|
| Adult size | 13 to 24 in including tail; 18 to 24 in per one husbandry manual | Typically about 154 lb (70 kg); largest verified 10.3 ft and 366 lb (166 kg); ADW gives up to 165 kg and over 3 m |
| Native range | Deserts, dry forest and scrub, eastern South Australia to the southeastern Northern Territory and eastern Australia | Indonesian islands: Komodo, Rinca, Flores and Padar (Padar unseen since the 1970s) |
| Diet | Opportunistic omnivore: insects, plants, occasionally small rodents or lizards | Carrion and hunted prey up to deer, boar, goats and water buffalo; young eat insects, small reptiles and birds |
| Lifespan | 7 to 10 years in captivity, some to 14 | About 30 years in the wild per the Smithsonian; about 50 per ADW |
| Venom | None reported | Venom glands in the lower jaw; saliva carries about 50 bacterial strains |
| Temperatures | Preferred zone 25 to 40 C (77 to 104 F); basking 35 to 40 C | Wild habitat: dry season days reach about 35 C (95 F) per the San Diego Zoo |
| Humidity | Dry conditions; high humidity can lead to respiratory infection | Wild habitat: about 70 percent in the dry season per the San Diego Zoo |
| Temperament | Often calm and accepts handling | Large predator; not a handled animal |
| Pet suitability | Common pet, suits beginners | Not a pet; IUCN Endangered per the San Diego Zoo, US federal Endangered, CITES Appendix I per ADW |
Size and native range
An adult bearded dragon fits in a 120 cm enclosure. A Komodo dragon can outweigh a grown person.
The Smithsonian National Zoo lists a typical Komodo weight near 154 pounds. Males grow larger than females.
Bearded dragons come from the hot, dry interior of Australia, where they bask on fallen branches and fence posts. They are semi arboreal, so they do climb. Their habitat is covered in more detail on the bearded dragon wild habitat page.
Komodo dragons live on a handful of Indonesian islands and nowhere else in the wild. Komodo National Park, established in 1980, protects part of that range.
Diet and feeding
Bearded dragons eat both insects and plants. The NSW husbandry manual feeds juveniles two to three times daily and adults every 1 to 2 days.
Calcium and vitamin supplements go on the food. That is about every other day for juveniles and twice weekly for adults.
Komodo dragons are meat eaters that scavenge carcasses or stalk prey. Animals older than about 5 years take deer, goats and boar.
The Smithsonian notes deer as a preferred meal. Hatchlings eat insects, small lizards, snakes and birds, which is the only overlap with a bearded dragon menu.
Venom and bite risk
Komodo dragons have venom glands in the lower jaw. The Smithsonian describes venom that prevents blood from clotting, which causes heavy blood loss and shock.
Animal Diversity Web says research suggests the venom helps subdue prey. The saliva holds over 50 bacterial strains.
The original venom paper could not be opened, so the mechanism stays at that summary level. The venom belongs to Komodo dragons. No venom is reported for the bearded dragon.
Conservation status
Sources disagree, and the disagreement is worth knowing. Animal Diversity Web lists the Komodo dragon as Vulnerable on the IUCN Red List, and the Smithsonian page lists Least Concern.
The San Diego Zoo gives the current answer: Endangered, reclassified from Vulnerable in 2021. The older pages predate that change, so check the Red List entry before quoting a category.
Animal Diversity Web also lists the species as Endangered under US federal law and on CITES Appendix I.
The CITES Appendix I listing means international commercial trade is tightly restricted. Animal Diversity Web lists the bearded dragon as not evaluated by the IUCN, with no special CITES status.
Why only one is a pet
Captive bred bearded dragons have been popular pets since the 1960s, says Animal Diversity Web. It stays a manageable size, and it is one of the few lizards described as naturally tame. A full species profile is at bearded dragons as pets.
A Komodo dragon needs the space, food and safety planning of a large predator. International trade rules also protect it.
The Smithsonian notes it can eat animals as large as water buffalo. It is a zoo animal, not a household one.
What a bearded dragon needs
Bearded dragons need heat and UVB. LafeberVet gives a preferred temperature range of 25 to 40 C (77 to 104 F). The NSW manual calls a basking spot of 35 to 40 C essential.
It also asks for cooler areas of 20 to 29 C. UVB is required for calcium regulation, and Merck advises UVB lights under 30 cm from the animal in reptiles generally.
Bearded dragons dislike humid conditions, and high humidity can lead to respiratory infection. Dragons are generally solitary, and Merck advises ideally keeping a single species in any enclosure. Housing with other animals is covered on the iguana cohabitation page.
Reptiles in general can carry Salmonella in the gut even when healthy, according to the CDC. Wash hands after handling any reptile or its equipment, and keep enclosures out of food areas.
Which owner each animal suits
A first time reptile keeper who wants a handleable pet should choose the bearded dragon. It needs a basking lamp, UVB, a dry 120 cm enclosure and a diet of insects and plants.
Startup cost is modest next to most large reptiles. Lighting, the enclosure and a reptile vet still add up.
A Komodo dragon suits accredited zoos and conservation programs, not private homes. Anyone drawn to a large monitor should look at a species profile and local law first. For a small dragon that lives well alongside a household, the bearded dragon guide is the place to start.
Verdict on the bearded komodo dragon question
A bearded komodo dragon is two animals with different needs, and the name is the only real overlap. Choose the bearded dragon if you want a pet.
Treat the Komodo dragon as a wild species to learn about. If you are still weighing the animal against other pets, see the dog cohabitation page.
Frequently Asked Questions
Is a bearded komodo dragon a real animal?
No. A bearded dragon stops around 13 to 24 inches including the tail, and it is a different genus. A Komodo dragon hatches as a Varanus and grows into one of the largest lizards on Earth.
How long does each lizard live?
Bearded dragons live 7 to 10 years in captivity and sometimes reach 14 according to the NSW manual. Komodo dragons live about 30 years in the wild per the Smithsonian. Animal Diversity Web gives about 50 years.
Is a bearded dragon venomous like a Komodo dragon?
No venom is reported for the bearded dragon. The Komodo dragon has venom glands in the lower jaw and a saliva rich in bacteria.
Can I keep a Komodo dragon as a pet?
It is not a realistic pet. The San Diego Zoo lists it as Endangered on the IUCN Red List since 2021, and Animal Diversity Web lists it as Endangered under US federal law and on CITES Appendix I. Its adult size and diet also rule out private care.
Do both lizards live in the same part of the world?
No. Bearded dragons are Australian, and Komodo dragons live on Indonesian islands including Komodo, Rinca, Flores and Padar. The two ranges do not overlap.
Do baby Komodo dragons eat what bearded dragons eat?
Partly. Young Komodo dragons eat insects, small reptiles and birds, which overlaps with the insect side of a bearded dragon diet. Bearded dragons also eat plants, and adult Komodo dragons switch to large prey and carrion.
Sources
- Animal Diversity Web: Varanus komodoensis. https://animaldiversity.org/accounts/Varanus_komodoensis/#information
- Animal Diversity Web: Pogona vitticeps. https://animaldiversity.org/accounts/Pogona_vitticeps/#information
- Smithsonian National Zoo: Komodo Dragon. https://nationalzoo.si.edu/animals/komodo-dragon
- NSW Fauna and Marine Parks: Husbandry Manual for Bearded Dragons. https://nswfmpa.org/Husbandry%20Manuals/Published%20Manuals/Reptilia/Bearded%20Dragons%20(Nelson).pdf
- LafeberVet: Clinical Medicine of Bearded Dragons. https://lafeber.com/vet/clin-med-bearded-dragons/
- Merck Veterinary Manual: Management and Husbandry of Reptiles. https://www.merckvetmanual.com/exotic-and-laboratory-animals/reptiles/management-and-husbandry-of-reptiles
- CDC: Reptiles and Amphibians. https://www.cdc.gov/healthy-pets/about/reptiles-and-amphibians.html
- San Diego Zoo Wildlife Alliance: Komodo Dragon. https://animals.sandiegozoo.org/animals/komodo-dragon