Discover The 4 Most Dangerous Animals Swimming In North Carolina’s Lakes And Rivers

Written by Angie Menjivar
Updated: June 14, 2023
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When the sun is shining and it’s time to cool off, most think of fun in or on the water. However, where there’s wildlife, there’s potential danger. Discover the four most dangerous animals swimming in North Carolina’s lakes and rivers!

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1. Alligator

Scientific name: Alligator mississippiensis

Alligators live in 10 states throughout the U.S. and North Carolina is one of them. Don’t let the size of these solitary creatures fool you — they’re swift! They hang out around swamplands and marshes and can weigh as much as 800 pounds. They live long lives as well, with some gators making it to their fifties. Alligators are sneaky and lurk underwater, looking for opportunities to snatch up prey. This might be a pet that gets too close to the water’s edge, and it could also be a human if the gator is hungry.  

Alligators can be found in North Carolina waters

Alligators can weigh as much as 800 pounds.

©Sorbis/Shutterstock.com

2. Cottonmouth

Scientific name: Agkistrodon piscivorus

Cottonmouths, also known as water moccasins, are deadly venomous snakes best admired from a very safe distance. When a cottonmouth is in full defense mode, its mouth agape, you can see the white color inside its mouth. That’s how they got their common name! These snakes have wide heads, noticeably wider than their necks, and the patterning on their bodies is both brown and olive-colored.

Pets and humans should avoid walking in areas with tall grasses around water, as a bite from a cottonmouth causes severe pain, swelling, and requires anti-venom right away to prevent severe tissue damage and death.

Cottonmouths can be found in and around North Carolina lakes and rivers

Cottonmouths are venomous snakes which can be found in and around North Carolina lakes and rivers.

©Rafael R Sandoval/Shutterstock.com

3. Nutria

Scientific name: Myocastor coypus

Nutrias, also known as coypus, are large rodents with distinctive orange teeth. This is an invasive species in North America that wreaks havoc on vegetation, sometimes destroying entire habitats. These semi-aquatic animals carry a variety of diseases as well, which makes them a danger not just to humans, but also to pets and even livestock.

capybara vs nutria

Nutria are large rodents with distinctive orange teeth that are considered an invasive species.

©Ondrej Prosicky/Shutterstock.com

4. American Mink

Scientific name: Neovison vison

The semi-aquatic American mink makes up part of the weasel family. These animals have long, slender bodies perfectly suited for entering burrows so they can prey on different small mammals. They also eat insects, crabs, birds, and bird eggs. Although they may appear cute to some, they are aggressive and like to hunt and eat meat. If you spot one, keep moving!

American mink

The American mink is an aggressive member of the weasel family.

©An inspiration/Shutterstock.com

Non-Dangerous Animals In North Carolina

A variety of other, non-dangerous animal species live throughout the state including muskrats, North American river otters, salamanders, mute swans, tundra swans, and Canada geese. Fish species include the redeye bass, sauger, white crappie, catfish, brook trout, spotted bass, chain pickerel, channel catfish, and striped bass, among others.

Summary Of The 4 Most Dangerous Animals In North Carolina’s Lakes And Rivers:

RankCommon NameScientific NameDanger
1AlligatorAlligator mississippiensisA bite from large, powerful jaws and sharp teeth can kill a person or pet.
2CottonmouthAgkistrodon piscivorusA venomous bite causes severe pain and swelling, requiring anti-venom to prevent severe tissue damage or death.
3NutriaMyocastor coypusCarries diseases.
4American MinkNeovison visonAggressive; likes to hunt and eats meat.
Summary Table Of The 4 Most Dangerous Animals In North Carolina’s Lakes And Rivers

The photo featured at the top of this post is © Sonja Guijarro/Shutterstock.com


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About the Author

Angie Menjivar is a writer at A-Z-Animals primarily covering pets, wildlife, and the human spirit. She has 14 years of experience, holds a Bachelor's degree in psychology, and continues her studies into human behavior, working as a copywriter in the mental health space. She resides in North Carolina, where she's fallen in love with thunderstorms and uses them as an excuse to get extra cuddles from her three cats.

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