In Peninsular Malaysia, I saw these gorgeous geckos mostly on large boulders, though some were in the root systems of thick trees. As usual, my guide Kurt "Orion" G knew right where to look for them.

My Travelogues and Trip Lists page includes a complete list of the herps I saw in the wild on this trip to Malaysia, as well as a travelogue of the trip.

Youngsters like this one have higher-contrast patterns than the big adults, making them perhaps even more beautiful.

On Borneo I saw several more of these geckos, though they were mostly on medium-sized tree trunks rather than large boulders. Could just be due to low sample size, of course.

Cyrtodactylus species are being discovered/described/split left and right these days. I would not be shocked to find these Borneo populations split into a separate species from the Peninsular Malaysia populations some day. At least in my small-sample-size observations, the Borneo ones had a somewhat lower-contrast pattern and fewer or less prominent tubercles on the back.

Here's one with particularly narrow crossbars.

These are really spectacular geckos in person. Their photos don't do them justice.