Key to data "We walked 53 trails in three islands of the Andaman archipelago: South Andaman, Little Andaman and Rutland, with a total effort of 313.23 man hours." Variables Recorded Island "Name of the island. Three islands were sampled: South Andaman, Rutland, & Little Andaman" Site Names of sites within islands. Weather Dry weather (no rains) or wet weather (rains) Moon Lunar phase during sampling occasion Species "Species of lizards: C. subristatus = Coryphophylax subcristatus, C. brevicaudus = Coryphophylax brevicaudus" Sex Sex of the lizard; not recorded in case of C. brevicaudus due to low external sexual dimorphism in this species Age "Age of lizards; classified as Adult, Sbad (subadult), and Juvenile " Weight (g) Body weight of lizards in grams Snout-vent length (in cm) Distance from tip of snout to cloaca in centimeters Tail length (in cm) Distance from cloaca to tip of tail in centimeters Perch "Perch used by lizards for sleeping, classified as: fallen branch, seedling, sapling, trees, and vines/lianas/climbers" Substrate "Part of the plant used by the lizards for roosting (branch, buttress, fallen branch, leaf, leaf-branch (in case of palms), trunk, & trunk-leaf)." Perch height (in cm) Vertical distance of the perch from ground level Leaf length (in cm) Length of the leaf along the mid vein on its long axis. Leaf width (in cm) Maximum width of the leaf perpendicular to its length GBH (cm) Girth of the perch plant at breast height (at 1.37 m above ground level) Branch circumference (in cm) "Circumference of the perch branch in centimeters (at the base of the petiole, in case the substrate was a leaf)" Distance to main trunk (cm) Non linear distance of the perch position of the lizard to the main trunk of the plant. Orientation "Orientation of the perching substrate with respect to the ground (horizontal, vertical or angular)" Head direction "Head direction of sleeping lizards (inward, outward or perpendicular) of the lizards. The head direction in case the substrate was a branch, was determined with respect to the trunk (e.g. inward if head towards the trunk), in case of leaf with respect to the petiole (e.g. outward if away from the petiole and perpendicular if perpendicular to leaf axis) and in case of trunk with respect to the plant base (e.g. outward if away from the plant base)." Water Presence of water body within a 10 m radius Distance_same Distance to the nearest perch on the same plant. Distance_different Distance to the nearest perch on a different plant. Temperature (Degree Celcius) Air temperature at the perch position. Wind speed (km per hour) Wind speed measured in km/hr at the perch position of the lizard Humidity (%) Humidity at the perch position of the lizard (in percentage)