Northern Cottonmouth

Northern Cottonmouth

Agkistrodon piscivorus

Silhouette: Steven Traver · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered Endemic
Daily sighting probability ~60% · Likely
at Congaree National Park
219 Verified sightings at Congaree National Park From 2019 to 2026
219 Verified sightings across 1 park From 2019 to 2026
August Best month highest sighting rate
🌅 Crepuscular When it's spotted at dawn and dusk

About the Northern Cottonmouth

Agkistrodon piscivorus is a species of venomous snake, a pit viper in the subfamily Crotalinae of the family Viperidae. It is one of the world's few semiaquatic vipers (along with the Florida cottonmouth), and is native to the Southeastern United States. As an adult, it is large and capable of delivering a painful and potentially fatal bite. When threatened, it may respond by coiling its body and displaying its fangs. Individuals may bite when feeling threatened or being handled in any way. It tends to be found in or near water, particularly in slow-moving and shallow lakes, streams, and marshes. It is a capable swimmer, and like several species of snakes, is known to occasionally enter bays and estuaries and swim between barrier islands and the mainland.

The generic name is derived from the Greek words ἄγκιστρον agkistron "fish-hook, hook" and ὀδών odon "tooth", and the specific name comes from the Latin piscis 'fish' and voro '(I) eat greedily, devour'; thus, the scientific name translates to "hook-toothed fish-eater". Common names include cottonmouth, northern cottonmouth, water moccasin, swamp moccasin, black moccasin, and simply viper. Many of the common... Wikipedia →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Congaree National Park 🇺🇸 United States
~60%

More parks will be added in future updates.

Quick answers

What are the chances of seeing a Northern Cottonmouth in Congaree National Park?

About 60% of wildlife watchers report a Northern Cottonmouth sighting in Congaree National Park, based on 219 verified sightings from GBIF citizen-science data.

When is the best time to see Northern Cottonmouth in Congaree National Park?

August has the highest sighting rate for Northern Cottonmouth in Congaree National Park in our monthly data.

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