How to Identify the Dusky Pygmy Rattlesnake (Identification Guide)
A guide to identifying this small southeastern rattlesnake by its gray body, dark blotches, and tiny rattle that produces a barely audible buzz.
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Key identifying features
The dusky pygmy rattlesnake (Sistrurus miliarius barbouri) is a small rattlesnake subspecies found in the southeastern United States, particularly Florida and neighboring states. It is recognized by its diminutive size, a gray to grayish-brown body marked with dark blotches, and a tiny rattle that is often nearly inaudible, quite unlike the loud rattle of larger species.
Coloration & pattern
The dorsal color is typically gray or grayish-brown, sometimes with an orange or reddish stripe running down the middle of the back, overlaid with a row of dark gray to black rounded or squarish blotches. Smaller dark spots often run along the sides, and the overall pattern combined with the dusky gray background gives the species its common name. The belly is generally pale with dark blotching.
Head, eyes & scales
The head is triangular and distinct from the neck, with vertically elliptical pupils. As with other pygmy rattlesnakes, it has nine large plate-like scales on top of the head, differing from the numerous small scales seen in larger rattlesnake species. Dorsal scales are keeled.
Size & body shape
This is one of the smallest rattlesnake species, with adults typically reaching only 30 to 60 cm in length. The rattle is correspondingly tiny, often producing a sound so faint it resembles an insect buzz rather than a true rattle, and may be difficult to hear from more than a short distance.
Range & habitat where you'll see it
The dusky pygmy rattlesnake is found throughout Florida and parts of neighboring southeastern states, inhabiting a range of habitats including pine flatwoods, prairies, and areas near water. It is often encountered in suburban and semi-natural settings within its range.
How to tell it apart from look-alikes
Its small size, gray coloration with dark blotches, and tiny, faint rattle distinguish it from larger rattlesnake species. Compared to the closely related Carolina pygmy rattlesnake, the dusky pygmy rattlesnake tends to show a darker, more grayish overall tone and a more southern Florida-centered distribution.
Frequently asked questions
How loud is the dusky pygmy rattlesnake's rattle?
It is very faint, often resembling an insect buzz rather than the loud rattle of larger rattlesnake species.
What color is this snake typically?
Gray to grayish-brown with dark blotches, sometimes with a faint orange or reddish stripe down the back.
How big does the dusky pygmy rattlesnake get?
It is one of the smallest rattlesnakes, with adults typically reaching only 30 to 60 cm in length.
Where is this subspecies found?
Throughout Florida and parts of neighboring southeastern states, in habitats like pine flatwoods and areas near water.