Meet the planet's heavyweight lizard
The Komodo dragon (Varanus komodoensis) looks like something that wandered out of the age of dinosaurs, and in conservation terms it is just as fragile. It lives in only one place on Earth, carries a venomous bite, and can occasionally reproduce without a male. Here are twelve genuinely surprising things worth knowing about it - and why its future is far from guaranteed. For the full picture, see our Komodo dragon species guide.
1. It is the largest lizard alive today
Adults can reach about 3 metres (roughly 10 feet) long. The heaviest reliably recorded individual tipped the scales at around 166 kilograms, though most wild adults weigh closer to 70-90 kg.
2. Its bite is genuinely venomous
For decades the dragon's deadly bite was blamed on "dirty mouth" bacteria. Research published in 2009 instead identified venom glands in the lower jaw that release toxins which stop blood clotting and lower blood pressure, helping fell prey far larger than the dragon itself.
3. Females can have fatherless babies
Through a process called facultative parthenogenesis, a female can occasionally produce fertile eggs with no male involved. Because of how the dragon's sex chromosomes work, those fatherless clutches hatch out entirely male.
4. Baby dragons live in trees
Hatchlings emerge at roughly 40 cm long and promptly climb into the canopy. Spending their early years aloft keeps them away from hungry adults, which will happily eat smaller dragons.
5. It smells with its tongue
That flicking forked tongue collects scent particles, letting a dragon detect carrion from kilometres away.
6. It lives on just a handful of islands
The entire wild population is confined to a few Indonesian islands - Komodo, Rinca, Flores, Gili Motang and Nusa Kode - and nowhere else on the planet.
7. It can sprint - briefly
In short bursts a Komodo dragon can run around 20 km/h, fast enough to ambush deer and wild boar before they react.
8. It is now Endangered
In 2021 the IUCN moved the species from Vulnerable to Endangered, citing a small, fragmented population and climate-driven habitat loss.
9. Fewer than ~1,400 mature adults remain
That is the current estimate for breeding-age dragons in the wild, with no single island subpopulation thought to hold more than about 500.
10. They can eat enormous meals
A dragon can consume a huge proportion of its body weight in one sitting, then go weeks before needing to hunt again.
11. Clutches are large but slow
Females lay around 20 eggs that incubate for roughly seven to eight months before hatching.
12. Climate change is its biggest long-term threat
Rising seas and warming are projected to shrink the low-lying coastal savanna the dragon depends on - and because it is marooned on islands, it cannot simply move somewhere new.
Why it matters
A species found in only one corner of the world has no second home if that corner is lost. Our network helps fund local partners across Indonesia working on habitat stewardship and wildlife care; if you want to help, you can support habitat protection for the islands these dragons call home.
Read the full Komodo dragon wildlife guide for the facts, IUCN status and conservation context — or donate to WARN to help fund the local partners protecting this species.
