The short answer
The loud "to-kay" call you hear at night in Bali comes from a tokay gecko, called tokek in Indonesian. It is a large, harmless-unless-handled lizard that lives in roofs, attics and trees. The little pale lizards running across your walls and ceiling are house geckos, or cicak (pronounced chee-chak). Neither is dangerous, neither is a sign of a dirty room, and both eat the insects you would rather not have around. In Bali, a gecko in the house is normal and often considered lucky.
The tokay: Bali's noisiest housemate
The tokay is one of the largest geckos in the world, usually 25 to 30 cm long including the tail and occasionally up to 40 cm. It is blue-gray with orange or red spots, has big golden eyes, and can walk up glass and across ceilings thanks to the millions of tiny hairs on its toe pads.
The famous call belongs mostly to males. It starts with a short rattling cackle, then a series of loud, two-part croaks: "to-KAY, to-KAY," repeated several times. Males call to claim territory and attract females, mostly after dark, and Indonesian researchers note they are especially vocal when the weather turns from hot and dry to cool or rainy. In a quiet villa in Ubud or Sidemen, one tokay in the rafters can sound as if it is sitting on your pillow.
Tokays usually stay in roof spaces, behind cupboards or in garden trees rather than out in the open. You may go a whole trip hearing one every night and never see it.
Can a tokay gecko bite?
Yes, but only if you grab it or corner it. Tokays are territorial and have strong jaws, and a large male can break the skin and hold on. They do not chase people, are not venomous, and will retreat if left alone.
If one does bite, resist pulling it off, which makes the wound worse. Stay calm, keep still, and it will usually let go on its own, especially if it has a clear way to escape. Clean the bite well with soap and water and keep an eye on it for signs of infection. The simplest rule is not to try to catch or move one; give it space and it will do the same.
The cicak: small, quiet and useful
House geckos are the small, translucent lizards, about 7 to 15 cm long, that gather around lights in the evening. They make a soft "chik-chik-chik" chirp and are almost entirely harmless to people. They do not bite in any meaningful way and they do not carry anything you need to worry about if you wash your hands as usual.
What they do is hunt. Cicak eat mosquitoes, flies, moths, ants and termites, and a few of them patrolling your ceiling are a free and silent form of pest control. In a country where mosquitoes carry dengue, that is a genuinely useful roommate.
Why geckos live in your villa, and why that's good
Bali's architecture is open to the outdoors: thatched roofs, open-air bathrooms, wooden shutters and garden pavilions. Geckos follow the insects, and insects follow light. Every lamp on a terrace is a buffet. That is all it means. A gecko in your room is not a sign of poor housekeeping; it is a sign the room is part of a living garden.
If you want fewer of them inside:
- Switch off lights you are not using at night, especially near open doors.
- Keep food sealed and wipe up crumbs and sugary drinks, which attract ants.
- Close screens or mosquito nets at dusk.
What you should not do is use glue traps, sprays or poisons. They are cruel, unnecessary and remove the very animals that keep mosquitoes down. The small dark droppings geckos leave behind wipe away easily, and housekeeping deals with them daily.
Gecko calls and Balinese beliefs
Geckos carry a surprising amount of meaning in Indonesia. Across the archipelago, people count the tokay's calls: the series may end on an odd or an even number, and a run of seven calls, which is rare, is widely believed to bring great fortune to the household. Many Indonesians link the tokay's voice with good luck and with income coming into the home, and across Southeast Asia the tokay is a symbol of luck and fertility.
The cicak has its own role. In Javanese folklore, which is familiar in Bali too, a cicak chirping at the exact moment someone finishes a sentence is taken as confirmation that what was said is true. Indonesian tradition is less kind to the cicak in general, though: its chirps are more often linked with gossip or bad news than with luck.
Scientists offer a gentler explanation for the good feelings: a tokay sings most when the air is cool and comfortable, so its call tends to arrive on pleasant nights.
Leave them where they are
Tokays are not threatened globally, but they are heavily poached in parts of Asia for traditional medicine, and international trade in the species requires permits under CITES. Do not buy dried geckos, gecko "tonics" or live tokays in markets. In Bali, the best place for a tokay is the roof above your bed, calling to the night.
For the creatures you might actually want to avoid, see our guides to spiders and insects in Bali and snakes in Bali.
Frequently asked
What animal makes the to-kay sound in Bali?
The tokay gecko, or tokek. Males call loudly at night to claim territory, often in a run of several two-part croaks.
Can a tokay gecko bite you?
Yes, if you grab or corner it. The bite can break the skin and the gecko may hold on, but it is not venomous and will not attack if left alone.
Are geckos in my Bali villa a bad sign?
No. Geckos follow insects to lights and eat mosquitoes, flies and ants. In Bali they are considered normal and often lucky.
What does it mean when a gecko calls seven times?
In Indonesian folk belief, a rare run of seven tokay calls is said to bring great fortune to the household.
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