Pygmy Rattlesnake

Pygmy Rattlesnake

Sistrurus miliarius

Silhouette: Steven Traver · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered Endemic
Daily sighting probability ~10% · With luck
at Everglades National Park
66 Verified sightings at Everglades National Park From 2019 to 2026
70 Verified sightings across all 2 parks From 2019 to 2026
November Best month highest sighting rate
☀️🌙 Day & Night When it's spotted Active throughout day and night

About the Pygmy Rattlesnake

Common names: pygmy rattlesnake, eastern pygmy rattlesnake, ground rattlesnake, leaf rattler, death rattler, more. Sistrurus miliarius, commonly called the pygmy rattlesnake, is a species of venomous snake in the subfamily Crotalinae (pit vipers) of the family Viperidae. The species is endemic to the Southeastern United States. Three subspecies are currently recognized.

Sistrurus miliarius is a small species, but bulky in width, with adults usually growing to 40–60 cm (16–24 in) in total length (including tail). It is the smallest species of rattlesnake on the North American continent. The maximum reported total length is 78.8 cm (31.0 in) (Klauber, 1972). Snellings and Collins (1997) reported a specimen of S. m. barbouri measuring 80.3 cm (31.6 in), but it had been in captivity for over 12 years. The largest S. m. barbouri reported by Gloyd (1940) was a specimen measuring 63.8 cm (25.1 in) from St. Petersburg, Florida. Shine (1978) suggested that in some populations, males may be larger than females, but a later study by Bishop et al. (1996) did not find sexual dimorphism of any kind in a population in Volusia County, Florida. It is currently theorized that the lack... Wikipedia →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Everglades National Park 🇺🇸 United States
~10%
2 Big Cypress National Preserve 🇺🇸 United States
Insufficient data

Quick answers

What are the chances of seeing a Pygmy Rattlesnake in Everglades National Park?

About 10% of wildlife watchers report a Pygmy Rattlesnake sighting in Everglades National Park, based on 66 verified sightings from GBIF citizen-science data.

When is the best time to see Pygmy Rattlesnake in Everglades National Park?

November has the highest sighting rate for Pygmy Rattlesnake in Everglades National Park in our monthly data.

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