The Timber Rattlesnake (Crotalus horridus), known as 'miliarius' in some contexts, inhabits deciduous forests in the eastern United States. It is recognized for its distinctive rattle, heat-sensing pits, and cryptic coloration that provides camouflage among leaf litter. This venomous snake plays a crucial role in controlling rodent populations.

The species 'miliarius' is commonly known as the 'Pygmy Rattlesnake' (Sistrurus miliarius). Its native region is the southeastern United States. It is found in states such as North Carolina, South Carolina, Georgia, Florida, Alabama, Mississippi, Louisiana, and parts of eastern Texas and southeastern Oklahoma.

The Pygmy Rattlesnake typically inhabits a variety of environments, including pine flatwoods, sandhills, scrublands, mixed woodlands, and the borders of wetlands. It prefers areas with abundant ground cover such as leaf litter, fallen logs, and thick vegetation.

This species is adapted to warm, humid climates typical of the southeastern U.S. It is often found in areas that provide ample cover for hunting and hiding. The Pygmy Rattlesnake is a carnivorous predator, feeding on small mammals, birds, amphibians, and other reptiles. Its cryptic coloration helps it blend into its surroundings, aiding in both predator avoidance and prey ambush.