How to Identify the Carolina Pygmy Rattlesnake (Identification Guide)

Key identifying features

The Carolina pygmy rattlesnake (Sistrurus miliarius miliarius) is a small rattlesnake subspecies found in the Carolinas and parts of the surrounding southeastern United States. It is recognized by its small size, a gray body marked with dark blotches, and often a noticeable reddish or orange stripe running down the center of the back, a feature that tends to be more pronounced in this subspecies than in the closely related dusky pygmy rattlesnake.

Coloration & pattern

The dorsal ground color is typically light gray to tan, with a row of dark gray or blackish rounded blotches running down the back. Many individuals show a distinct reddish-brown or orange vertebral stripe running between the blotches, which can make this subspecies visually distinguishable from the generally darker, grayer dusky pygmy rattlesnake. Smaller dark spots often occur along the sides, and the belly is pale with scattered dark markings.

Head, eyes & scales

The head is triangular and distinct from the neck, with vertically elliptical pupils. As with other pygmy rattlesnakes, nine large plate-like scales cover the top of the head, differing from the smaller, more numerous scales found on larger rattlesnakes. Dorsal body scales are keeled.

Size & body shape

This is a small rattlesnake, with adults typically reaching 30 to 60 cm in length. The rattle is tiny and often barely audible, producing a faint buzzing sound rather than the loud rattle associated with larger species.

Range & habitat where you'll see it

The Carolina pygmy rattlesnake is found in North and South Carolina and parts of adjacent southeastern states, inhabiting pine flatwoods, sandhills, and mixed forest habitats, often near wetlands or streams. It is generally more associated with the northern part of the pygmy rattlesnake's overall range than the dusky pygmy rattlesnake.

How to tell it apart from look-alikes

The presence of a distinct reddish or orange vertebral stripe combined with a paler gray background helps distinguish the Carolina pygmy rattlesnake from the generally darker, grayer dusky pygmy rattlesnake. Its small size and tiny rattle also separate it clearly from larger rattlesnake species found within its range.