Cottonmouth Moccasin Snake
Ranked #149 in Pets & Animals, #3,971 overall
Cottonmouth, Cottonmouth Moccasin or Water Moccasin, poisonous reptile
The Cottonmouth (which used to be called Cottonmouth Moccasin or Water Moccasin) is a venomous semi-aquatic snake. It is one of the five species of pit viper that inhabits Louisiana. It is also the only semi-aquatic viper in the world.
The name, Cottonmouth, comes from the way the inside of the mouth is white and looks like cotton. When cornered, as a defense mechanism, this snake will open its mouth to display the "cotton", but they would rather just be left alone.
On this page you'll find information about and photographs (posters) of the Cottonmouth snake, as well as some snake mouse pads, postage stamps, books and apparel, . We have also included a venomous snake quiz that we hope you'll enjoy.
Venomous Snake Quiz
Here's a quick little quiz to see how much you know about venomous snakes. Go ahead and take it. I promise it won't bite.
Identification of Agkistrodon piscivorus

Cottonmouth Snake Basking by naturegirl7
This Cottonmouth is probably a pregnant female. Did you know that Cottonmouth snakes give birth to live young? She was photographed basking on a root ball beside Pruden Creek. You can see the broad body is very pronounced and how it suddenly ends and the short tail begins.
The Cottonmouth (also called Cottonmouth Moccasin and Water Moccasin) is a member of the Viper family.
It is a heavy bodied, dark brown or black snake with a pattern of broad dark cross bands, which usually grow darker with age.
The tail is short compared to other water snakes.
The belly is brown and is heavily blotched with black.
There is a deep pit in the side of the head between the eye and the nostril and a broad dark line from the eye to the angle of the jaw.
Juveniles have a sulfur yellow tip on their tails with bright, clear patterned markings that look more like it's relative, the Copperhead.
When cornered or threatened, the cottonmouth will open its mouth to show the white, cotton-like lining.
Cottonmouths are found all over the state of Louisiana in every permanent or temporary aquatic habitat. Their primary prey is fish that are small enough to be eaten whole, but they also eat frogs, non-poisonous snakes, birds, squirrels and other rodents.
Female Cottonmouths ovulate during May and give birth during August.
The photo below shows two of the five species of the family Viperidae in Louisiana.
C. Copperhead, Agkistrodon contortrix
D. Cottonmouth, Agkistrodon piscivorus

reference: Dundee, Harold A. and Douglas A. Rossman, The Amphibians and Reptiles of Louisiana
The Cottonmouth is the only semi-aquatic viper in the world.
Cottonmouth Coiled and Ready

Buy Cottonmouth Moccasin Poster by naturegirl7
This Cottonmouth was coiled by a big White Oak tree on a ridge along the Tchefuncte River during a high water incident. We try to discourage them from laying beside a trail, so we chased it away after the picture was taken.
Venomous Snakes of the Southeast
Rio Saves the Day
Another Cottonmouth was silently making its way to a little beach by the Tchefuncte River, where Al and I and our two dogs, Rio and Chance were peacefully sitting, enjoying the beautiful day. We would have never know the snake was there if it had not been for Rio. All of a sudden he got up and gave a quick bark, while he did a fake lunge and withdraw move at the snake. The snake promptly turned around and slid back into the water. While Rio continued to patrol the little beach I got this shot of the Cottonmouth.
Cottonmouths
Baby Cottonmouth Snake
Because of their bright color, juvenile Cottonmouth snakes are often confused with Copperheads. One distinguishing feature is the yellow tip of the tail. This snake will darken as it ages and it will loose the yellow tip.

Buy Juvenile Cottonmouth Snake by eaglelady1
In late spring we decided to extend the little single carport that was attached to the back of our house and turn it into a screened porch and winter greenhouse combination. We also put hardware cloth inside, so that our cats and dogs could enjoy the protected outdoor area without damaging the window screen.
During construction, an unexpected visitor decided to check out the new structure. I happened upon it when it was curled in the corner under the new water faucet. Here is one of the many pictures that I took of the unwelcome surprise guest.

Baby Cottonmouth Snake by naturegirl7
After the photo op, I used a piece of scrap lumber to lift it so that it could be taken outside. As soon as it was released, it slithered off into the leaves. Hopefully he won't come back to see us again.
Young Cottonmouth Near the Creek
Snakes of the Southeast
Coachwhips, cottonmouths, and more.Fifty-two kinds of snakes can be found in the Southeast, almost half of all species native to North America. Filled with more than 300 color photographs and written by two of the region+s most renowned herpetologists, this is the most comprehensive educational guide to the snakes of the Southeast.At the heart of the guide are its heavily illustrated, fact-filled descriptions of each species and its habitat. Also included is a wealth of general information about the importance of snake conservation and the biology, diversity, and life cycles of snakes. Useful information about the interactions of humans and snakes is also covered: species that are likely to be found near houses, snakes as pets, what to do in case of a snake bite, and more.Clearly written, cleanly designed, and fun to use, the guide will promote a better understanding of the habitat needs of, and environmental challenges to, this fascinating group of animals.
Cottonmouths on Amazon
DO NOT Try This at Home!
You should never try to pick up a Cottonmouth.
Most of bites from Cottonmouths occur when someone is either trying to pick one up or when they are accidentally stepped upon. Having said that, let me say that my husband doesn't always listen to me and he has been handling snakes (both poisonous and non-poisonous) since he was quite young. He is an experienced snake handler and always takes the proper precautions when removing a poisonous snake from an inhabited area.
Because of the population explosion of song birds this year, this Cottonmouth was making its home around our bird feeders near the house and had already killed a young Cardinal and a young Blue Jay. So one morning, the opportunity to capture and move the snake presented itself. My husband released it a mile away in an unpopulated area by the Tchefuncte River.
Wild Guide: Venomous Snakes
Wild Guide: Venomous SnakesA full-color guide to the natural history of venomous snakes. Information on dealing with venomous snakes in the wild. Includes 19 North American species accounts Feared and reviled by many, venomous snakes are woefully misunderstood. This illustrated guide clears up many of the misconceptions about the animals and offers a glimpse into their extraordinary lives. Covering everything from hunting, feeding, and locomotion to shedding, mating, and reproduction, the book also examines the difficulties that these snakes and humans have coexisting and gives advice on what to do should you encounter a venomous snake in the field. About the author: Cynthia Berger is a writer and editor whose work has appeared in magazines such as National Wildlife, Sports Afield, and Birder's World. She lives in State College, Pennsylvania.
Chance the Cocker Spaniel is a Hero
Our maladjusted, rescued 2nd Chance the Cocker Spaniel is a hero. One morning, on our walk to the Tchefuncte River we were going about our business as usual. Rio and I had spied a photo op along Pruden Creek and were focused on finding the bird that we had just seen fly into the trees. Al was filling up the bird feeder and Chance was sniffing around about 3 feet behind us. All of a sudden I heard a scuffle and turned to see Chance whipping his head back and forth with a Cottonmouth hanging from his throat. I called for Al and stepped towards Chance. Just as I reached him, the snake flew off and hit the ground wiggling to get away. I was able to get a leash on Chance, but he was so enraged that he pulled me towards the Cottonmouth. Al herded the snake away from us and it escaped into a hole. When Chance settled down enough for me to look at his neck, I saw drops of watery blood.
Long ago, our vet told us that dogs don't react to snake bites as violently as humans. Usually a Benadryl tablet taken within an hour of the bite is sufficient treatment for dogs, unless the snake is very large or the bite is in the throat area. Since this bite was on the throat, Chance had to go to his least favorite place in the world, the Vet's office. He was surprisingly calm as Dr. Rusty shaved his neck and gave him injections and we were told to watch the wound for infection. If Chance hadn't scratched it so much, he would have been fine, but a hot spot developed that required more treatment. Eventually the wound healed and Chance is fine now. In fact, the ordeal seems to have tempered him a little and he seems to trust us a little more.
I certainly have a special feeling for him. Chance saved me from a painful and life-threatening bite and I will forever be in the little fellow's debt.
Cottonmouth Book
Cottonmouth Preparing to Shed
Chance found another Cottonmouth, but didn't stick his nose in its face this time.
Snakes of the U.S. and Canada
Cottonmouth Poll
Cottonmouths on Zazzle
Snakes on eBay
Creepies 100 Piece Puzzle

Creepies 100 Piece Puzzle
Price: 11.99
This jigsaw puzzle measures 19.25" x 14.25" when complete. For ages 6 and up.
Other Louisiana Snake Lenses
Other Venomous Snakes of Louisiana Lens Pages
Let's Strike up a Conversation!
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pawpaw911 May 15, 2012 @ 8:54 am | delete
- Love your photos. I have to say, your husband has more guts than I do.
Thanks for the feature. I returned the favor. This lens in now featured on my Cottonmouth lens.
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RenaissanceWoman2010
Apr 13, 2012 @ 9:06 am | delete
- Stopping back by to bless this excellent article. So happy I do not have cottonmouths where I now live.
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Thrinsdream
Jan 14, 2012 @ 3:02 pm | delete
- Loved the story about Chance, I think my dog gets me into way more trouble than she gets me out of, but I adore her. Loved this lens. I knew nothing about this snake and now can go and show off my new found knowledge to my daughter who is somewhat of an enthusiast! With thanks and appreciation. Cathi x
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RenaissanceWoman2010
Sep 13, 2011 @ 1:37 pm | delete
- I encountered my first cottonmouths in Texas (water skiing). Not much fun to be in the water with them, especially when the tow boat is taking its time getting you out of the water! Thanks for this very educational lens. I learned a great deal. Now that I live in Colorado, the only poisonous snake I have seen near my property is the Prairie Rattler.
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pimbels
Jun 18, 2011 @ 11:57 am | delete
- Interesting lens. Thank you
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Cottonmouth Blog Posts
- Upstream With a Paddle: From cops to cottonmouths, float trips can be perilous ...
- The most dangerous creature on and near the water, though, is the cottonmouth (aka water moccasin), an all-black, venomous snake that can be potentially deadly. But it's nothing to worry about ? too much. There have been no snakebite fatalities in ...
- On Gardening: It's snake season – don't tread on them
- Six of them are venomous ? Eastern diamondback rattlesnake, timber rattlesnake, pigmy rattlesnake, copperhead, cottonmouth or water moccasin, and the coral snake. Most Alabama snakes are not venomous and should be left undisturbed whenever possible.
- It's that time of the season to be aware of what slithers
- ?Most are foraging to find water and food,? he said. The venomous cottonmouth, also called a water moccasin, ?make their living around water? and will travel miles to find it, he said. Moderate temperatures this time of year are optimal for snakes and ...
- Snake sightings up across Texoma
- Water Moccasins and Cottonmouths like tall grass near edges of banks. Copperheads and Rattlesnakes like tall grass too, but also wood piles. So how do you know whether a snake's dangerous? "One way to identify a poisonous snake in this area is they ...
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