Although reptiles are less abundant and diverse than amphibians, a number of snakes are conspicuous members of the fauna. One of the largest is the non-venomous black rat snake ('), while the common garter snake (') is among the smallest but most abundant. The American copperhead (') and the timber rattler (') are venomous pit vipers. There are few lizards, but the broad-headed skink ('), at up to in length, and an excellent climber and swimmer, is one of the largest and most spectacular in appearance and action. The most common turtle is the eastern box turtle ('), which is found in both upland and lowland forests in the central and southern Appalachians. Prominent among aquatic species is the large common snapping turtle (), which occurs throughout the Appalachians.