Carlia caesius is heliothermic. In the Timika area, it is often observed basking in patches of sunlight on the floor of primary and secondary lowland alluvial rain forest. These forests have a semiclosed canopy that is 30 – 35 m high and are dominated by large buttressed trees and lianas. The forest floor is relatively open with a thin layer of leaf litter or bare ground and a sparse growth of herbs and shrubs. Some of the dominant tree genera include Pometia (Sapindaceae), Celtis (Ulmaceae), Octomeles (Datiscaceae), and Syzygium (Myrtaceae). There are at least three other similarly sized, grounddwelling, heliothermic species of skinks inhabiting these forests, including Emoia aenea, E. jamur and E. tropidolepis. These species, together with Carlia caesius prefer relatively open parts of the forest that receive moderate to abundant sunlight. Another skink, Lygisaurus [Carlia] novaeguineae, a smaller species, also inhabits the forest floor but tends to prefer denser forest that the other species. Emoia caeruleocauda also occurs in these forests but tends to be semiarboreal and forage in low vegetation such as shrubs and fallen trees. Carlia caesius also occurs in disturbed habitats such as village margins and garden clearings where in the Timika area it cooccurs with at least five species of heliothermic skinks, including Emoia aenea, E. jamur, and E. tropidolepis which occur in small numbers on the ground, and E. caeruleocauda and E. longicauda which are semiarboreal and arboreal, respectively, and common. Carlia caesius is by far the most abundant lizard in disturbed areas. Common trees in these areas include Macaranga sp. (Euphorbiaceae), Casaurina equisetifolia (Casurinaceae), Campnosperma montana (Anacardiaceae), Pisonia sp. (Nyctaginaceae), Linociera sp. (Oleaceae), Artocarpus sp. (Moraceae), and Pandanus sp. (Pandanaceae). The Timika area has a mean temperature of 25.9 ºC with little seasonality (monthly means range from 24.2 to 26.6 ºC). Rainfall is somewhat more seasonal, with a peak in July but no distinct dry season. Generally, monthly rainfall is at least 200 mm with an average of about 20 rain days each month.
Sumber: New Carlia fusca complex lizards (Reptilia: Squamata: Scincidae) from New Guinea, PapuaIndonesia
