Discover the 9 Most Snake-Infested Rivers In The United States
By Sandy Porter,
2024-07-20
Home to around 50 species of snakes, of both venomous and harmless varieties, the United States offers plenty of snake-spotting opportunities. Now, whether or not you want to spot the snakes is a call we can’t make for you, but the snakes sure can! They’re less than eager to run into humans and would much prefer staying far away from bipedal creatures.
Every state in the country has at least one venomous species of snake, save for Hawaii, Rhode Island, Alaska, and Maine. Admittedly, there are more venomous than harmless snakes in the number of species. However, many of the most commonly spotted snakes are harmless. It’s best not to take your chances, though, as many species can be deadly.
When you hit the riverfront, be sure to avoid snakes, particularly any you aren’t 100% sure able to identify.
The Most Snake-Infested Rivers in America
With approximately a quarter million (250,000) rivers flowing along a total of about 3.5 million miles, the United States is rife with opportunities for water snakes to find homes. Of course, some of the rivers and waterways are far more conducive to reptiles than others, with some being just “okay” for them. The factors for snakes infesting an area may vary largely, but some would include things like food supply and predation.
Arkansas River – American West to Southeast
Nine common species of water snakes may be found skimming across the waters, baking on the shore of, or drifting downstream in the Arkansas River. Semi-aquatic or aquatic, it doesn’t matter – these reptiles are everywhere! Well, thankfully not literally everywhere, but they’re extremely present in the river and often seen basking nearby, taking in the sun.
Snakes you’ll see along the Arkansas River include:
Midland water snake
Broad-banded water snake
Diamondback water snake
Graham’s crayfish snake
Gulf swamp snake
Green water snake
Northern cottonmouth
Queen snake
Plain belly water snake
Cumberland River Basin – American Central East
Flowing through both Kentucky and Tennessee, the Cumberland River is home to a wide range of both harmless and venomous snakes. As they say, you’ll run into three things in summertime in the area: poison ivy, ticks, and snakes. And while many of us feel that snakes are equally as awful as the first two on the list, snakes actually do serve a purpose in the ecosystem where they live. Killing off some pests and scaring off others, snakes can even be “friendly” to many of us. Just don’t touch them, especially as identifying “good” versus “bad” snakes can be tricky.
Known as the longest river in the United States, the Missouri River is home to a huge array of wildlife species, including a ton of different snakes. The 2,540 miles of waterway may be home to as many as 47 different snake species and something like 900 animal species nearby. That’s plenty to keep the snakes busy at mealtimes and, perhaps more, for you in avoiding the scaly reptiles.
Making your way along the Missouri River, you could run into:
Northern water snake
Diamondback water snake
Yellow-bellied water snake
Graham’s crayfish snake
Mississippi green water snake
Western mud snake
Water moccasin (cottonmouth)
Broad-banded water snake
Colorado River – American Southwest
Beautiful Colorado, filled with glorious mountains, scenic byways, and landscape begging for exploration, is home to a huge number of snakes, particularly along the Colorado River and nearby areas. Heavy regulations control both recreation and industrial use of the river, which largely helps keep the wildlife flush in the region. Some 47 species of reptiles alone exist around the river, with many snakes included, some aquatic, semi-aquatic, and many terrestrial.
Some of the snakes you could run into in the snake-infested river could include:
Great basin gopher snake
Colorado bull snake
Northern water snake
Black neck garter snake
Plains garter snake
Smooth green snake
Rio Grande River – American Southwest
Roaring down from the Colorado Rockies into the Gulf of Mexico, the Rio Grande River flows through dams and irrigation diversions but remains one of the longest rivers in the United States. Some 30 species of snakes live near the river, particularly the lower Rio Grande, with just two varieties being venomous. The plethora of wildlife surrounding the river helps to draw snakes and other predators in for feeding, as well as tourists for wildlife viewing from safe vantage points.
Some of the snakes you could spot along the Rio Grande might include:
Texas blind snake
Flat-headed snake
Western diamondback rattlesnake
Texas coral snake
Texas indigo snake
Great Plains rat snake
Gulf Coast ribbon snake
Bullsnake
Checkered garter snake
Schott’s whipsnake
Alabama River – American Southeast
Another river teeming with snakes may be found in the southeastern portion of the United States – the Alabama River. Flowing some 300-plus miles, the Alabama River is home to many wild animals, with numerous fish species drawing them in. White bass, striped bass, crappie, catfish , and largemouth bass are some of the frequent catches along the waterway. The rivers of Alabama are known to have some of the most diverse collections of fish in them, which means water snakes are plentiful, too. These aquatic reptiles feed primarily on fish.
Some snakes you might spot in and near the Alabama River include:
Midland water snake
Plain-bellied water snake
Diamond-backed water snake
Queen snake
Brown water snake
Banded water snake
Northern cottonmouth
Gulf salt marsh water snake
Mississippi green water snake
Gulf swamp snake
Brazos River – American Central South
Perhaps a less well-known river than many others on this list, the Brazos River is one of Texas’s longest rivers. Sometimes known as the Rio de los Brazos de Dios (translated as the “River of the Arms of God”), the waterway opens out into the Gulf of Mexico with a 45,000 square-mile drainage basin. Often, the river is used to mark boundaries between East and West Texas. And though many outside the state might be less familiar with it, the Brazos River is closely tied to Texas history, particularly during the Texas Revolution and the Austin settlement periods.
The Mississippi River – American Midwest and Southeast
Possibly the most famous river in all of America, the Mississippi River is one of the most snake-infested waterways you’ll come to. Thankfully, in most areas, the snake population is skittish enough that you won’t see the reptiles. In fact, snakes hate being around humans and will dart away if they’re able to escape being seen. Of course, that doesn’t guarantee anything for anyone, and the many snakes that get spotted are as unhappy about it as the folks who spot them.
Okay, so the Everglades isn’t technically a river, but with the tributaries and flowing bodies of water all around, it’s close enough when it comes to exploration and adventure. And being the Everglades, tons of snakes are going to be found in the waters here! In fact, the Everglades are the most snake-infested portion of the whole state and one of the most snake-infested areas in the country. The Everglades also happen to be the largest surviving subtropical wilderness in all of the United States.
Here you’ll find both venomous and nonvenomous snakes of many varieties, including:
Burmese python (pets released into the wild that then overpopulated the area!)
Eastern diamondback rattlesnake
Copperhead
Florida cottonmouth
Florida scarlet snake
Eastern racer
Boa constrictor
Southern ringneck snake
Eastern indigo snake
Corn snake
Yellow rat snake
Eastern mud snake
Everglades rat snake
Eastern hognose snake
Scarlet kingsnake
Florida kingsnake
Eastern coral snake
Eastern coachwhip
Mangrove salt marsh snake
Rough green snake
And dozens more! It truly is a snake’s paradise and an ophidiophobe’s nightmare.
Watch Our YouTube Video on These Snake-Filled Rivers
Summary of the 9 Most Snake-Infested Rivers in the United States
Here’s a look back at the 9 U.S. rivers that are the most snake-infested.
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