Florida Cottonmouth
Florida CottonmouthFlorida CottonmouthFlorida CottonmouthFlorida Cottonmouth

Florida Cottonmouth

Agkistrodon conanti

Endemic
40–50% · Possible
overall probability at Everglades National Park
892 Verified records at Everglades National Park
September Best month highest sighting rate
🌙 Nocturnal When it's active during nighttime hours (6pm–6am)

The Florida cottonmouth (Agkistrodon conanti) is a species of venomous snake, a pit viper in the subfamily Crotalinae of the family Viperidae. The species is endemic to the United States, where it occurs in southern Georgia and the Florida peninsula in nearly every type of wetlands in the region, including brackish water and offshore islands. However, it is not entirely dependent on water and is occasionally encountered as far as a mile (1.6 km.) from surface water. Agkistrodon conanti venom is very hemolytic and known to cause relatively extensive necrosis compared to many snake venoms, and can sometimes be lethal with a 17% mortality rate. It is often confused with harmless watersnakes (Nerodia) and other semi-aquatic species with which it shares its habitat. It is a moderately large, thick bodied snake, adults averaging 30 to 48 inches (76-122 cm) in length, but rare individuals can exceed 6 feet (183 cm). Wikipedia →

40–50% of wildlife watchers report a Florida Cottonmouth sighting in Everglades National Park, based on 892 days of visitor records from GBIF citizen-science data.

Closest Relatives at Everglades National Park

Eastern Diamondback Rattlesnake
LC Endemic

Eastern Diamondback Rattlesnake

☀️ Diurnal Reptile

Crotalus adamanteus

10–20% · With luck
Pygmy Rattlesnake
LC Endemic

Pygmy Rattlesnake

☀️🌙 Day & Night Reptile

Sistrurus miliarius

5–10% · With luck

📅 Monthly Probability

30–40
Jan
20–30
Feb
40–50
Mar
40–50
Apr
40–50
May
40–50
Jun
30–40
Jul
30–40
Aug
40–50
Sep
40–50
Oct
40–50
Nov
30–40
Dec

🌙 When They're Spotted

Most active during nighttime hours (6pm–6am) · across all parks (global)

🌙Nocturnal
☀️🌙🌙12am6am12pm6pm12am

Global Distribution

Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.

where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is)  ·  parks where it occurs — tap a pin for the sighting probability there

Parks Where Found

# Park Country Probability
1 Big Cypress National Preserve 🇺🇸 United States
70–80%
2 Everglades National Park 🇺🇸 United States
40–50%

Quick answers

What are the chances of seeing a Florida Cottonmouth in Everglades National Park?

About 40% of wildlife watchers report a Florida Cottonmouth sighting in Everglades National Park, based on 892 days of visitor records from GBIF citizen-science data.

When is the best time to see Florida Cottonmouth in Everglades National Park?

September has the highest sighting rate for Florida Cottonmouth in Everglades National Park in our monthly data.

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