The Komodo dragon may not be able to fly or breathe fire like mythical dragons, but it certainly is one intimidating reptile!
Weighing up to 166 kg (366 lb.) and measuring up to 3 m (10 ft.) long, the Komodo dragon is the world’s largest and heaviest lizard. It has a deadly bite with a mouth full of serrated teeth, venom, and bacteria.
A type of monitor lizard, the Komodo dragon has brown or gray scaly skin, a long muscular tail and bowed legs.
Komodo dragons live in the tropical savanna forests of Indonesia’s Lesser Sunda Islands. They have inhabited these islands for millions of years.
To stay warm at night and cool during the day, Komodo dragons rest in shallow burrows. They either scratch out their own burrows or use one another lizard has made.
Forked Tongue for Smelling
Komodo dragons have long forked tongues which they flick out to collect scent particles. When they touch their tongue to the roof of their mouth, they can analyze the type and direction of the scent.
Venomous Bite
Sitting atop the food chain, Komodo dragons are apex predators. They hunt by hiding and waiting patiently for something to pass by. When an animal crosses its path, the Komodo dragon bites it while pulling back to create a gaping wound.
Toxins released from glands in their lower jaw cause the victim to lose blood quickly without clotting. Bacteria in the Komodo dragon’s teeth and saliva causes infection.
Even if the animal manages to escape, the venom and bacteria will kill it within a few days. And the Komodo dragon can use its superior sense of smell with its forked tongue to track down the animal when it finally dies.
One interesting note is that Komodo dragon venom is not deadly to other Komodo dragons. They have a special protein in their blood that makes them immune.
What Komodo Dragons Eat
Komodo dragons eat almost anything, including carrion (dead animals), rodents, monkeys, water buffalo, and even smaller Komodo dragons. However, their main prey is deer.
A Komodo dragon can eat up to 80% of its body weight in one feeding. It eats most of the animal including bones, hooves, intestines, and hide. Equipped with a flexible jaw, the Komodo dragon can open its mouth very wide.
Its stomach also expands easily, allowing it to eat large portions quickly.
Komodo Dragon Reproduction
Though generally solitary animals, Komodo dragons come together once a year in May through August to mate.
Males sometimes wrestle each other in upright positions to gain the females’ attention. The losing Komodo dragon will stay lying on the ground or will run off.
Interestingly, female Komodo dragons have another way to produce young without mating with males. Females can reproduce asexually in a process called parthenogenesis.
When this happens, an embryo develops in the egg with only the mother’s genes. (The female carries sets of both male and female chromosomes.) However, when Komodo dragons produce eggs this way, the offspring will always be male.
Females lay 20-30 eggs in a nest up to 2.5 m (8 ft.) deep. Each egg is about the size of a grapefruit. The female buries the eggs, and 8 months later, the babies hatch and tunnel out of the nest.
When first hatched, baby Komodo dragons are brightly colored with yellow and orange markings. They are only about 40 cm (16 in.) long and must protect themselves from being eaten by larger Komodo dragons.
One defense mechanism they use is to roll around in poop because the scent will dissuade other Komodo dragons from eating them. The other defense they use is to climb into the tree canopy where large Komodo dragons cannot reach them.
Young Komodo dragons spend most of their time in trees eating insects and geckos. As they get bigger, they come to the ground more often in search of food, and after a few years when they are large enough, they spend all their time on the ground.
Komodo dragons live about 30 years in the wild.
Conservation Status
Komodo dragons are considered endangered by the IUCN Red List. Threats include habitat destruction and fragmentation, poachers, and tourists who disrupt the mating process.
Komodo dragons do not like to venture far from where they are born, so when their habitat is destroyed or broken up, it reduces their opportunities to mate and inbreeding can occur.
What You Can Do to Help
In 1980, Indonesia established Komodo National Park which encompasses 1800 sq. km (700 sq. mi.) of protected habitat. But Komodo dragons still face many challenges.
If you would like to help Komodo dragons, you can support the Komodo Survival Program.
Komodo Dragon Range
More Komodo Dragon Resources
- National Geographic: Komodo Dragon
- Smithsonian’s National Zoo: Komodo Dragon
- San Diego Zoo: Komodo Dragon
- Komodo Survival Program
Quick Fact Sheet
Common Name(s): Komodo Dragon
Scientific Name: Varanus komodoensis
Animal Type: reptile
Size: Up to 3 m (10 ft.) long
Weight: 166 kg (366 lb.)
Lifespan: 30 years
Conservation Status: Endangered
About the Author
Abi Cushman is a contributing editor of Animal Fact Guide and My House Rabbit. She is also an award-winning author and illustrator of funny picture books for kids, including Wombats Are Pretty Weird and Flamingos Are Pretty Funky.
To learn more and to download free activity sheets, visit AbiCushman.com.
