Corn snake natural history – A corny situation

The North American corn snake (Pantherophis guttatus) is a medium-sized colubrid constrictor found from southern New Jersey all the way down to the Florida Keys and across to Texas. With beautiful reds, browns, yellows, and greys overlaid by darker “saddles” and striking checkerboard belly patterns, wild corn snakes are every bit as attractive as many of the fancy morphs seen in captivity today.

Growing up to 6 feet in length and weighing around 900 grams, corn snakes remain fairly slender for their size. They can live over 20 years in captivity, although in the wild 8–10 years is more typical—which is understandable when half the local wildlife either wants to eat them or accidentally drive over them.

Corn snakes are highly adaptable and can be found in arid scrublands, forests, farmland, wetlands, and swamps. Essentially, if there are rodents nearby, corn snakes are willing to give it a try.

Although considered mostly terrestrial, they are excellent climbers and will happily scale trees in search of birds’ nests or to escape predators. They are primarily nocturnal, preferring to hunt under cover of darkness and avoid competition with other species.

They also spend a great deal of time underground, exploring rodent burrows in search of food. Which is either clever opportunism or the reptile equivalent of breaking into someone’s house because it smells like snacks.

During extreme weather, corn snakes may brumate for up to three months, sheltering in insulated underground burrows and waiting for conditions to improve. A strategy many people wish they could use during winter.

Professional noodle assassin

Like all snakes, corn snakes are carnivorous and possess a broad diet in the wild. Amphibians, reptiles, rodents, birds, eggs, and even bats may all end up on the menu.

Corn snakes are constrictors and subdue prey by wrapping around it and squeezing. For many years it was believed constrictors killed by crushing bones or suffocating prey. Modern research suggests they actually interrupt blood circulation and overload pressure within the body, causing rapid loss of consciousness.

In short:
They hug things to death.

Nature is terrifying when explained casually.

After subduing prey, the snake swallows it whole—sometimes while the prey is still alive. Snakes are fascinating animals, but they are not particularly interested in making anyone comfortable.

How does that fit in there?!

Corn snakes feed much like most snake species around the world. Their jaws are connected by highly elastic ligaments, and the lower jaw is not fused together like it is in mammals.

This allows the jaws to spread sideways and independently “walk” prey into the mouth. The snake slowly advances its head over the prey item in a side-to-side motion while the jaws alternate pulling it backwards.

It looks deeply unnatural the first time you see it.

Corn snakes possess around 20–30 teeth, with more teeth on the upper jaw than the lower. These teeth are angled backwards to help grip prey and guide it down the throat.

Which is excellent design if you are a snake.
Less excellent if you are the mouse.

Digest first, ask questions later

After feeding, corn snakes usually retreat underground or into hides to digest. Burrows provide stable temperatures and safety from predators while the snake processes its meal.

Depending on prey size, digestion can take anywhere from 3–7 days.

As ectothermic reptiles, corn snakes rely entirely on external heat sources to regulate body temperature and metabolism. Unlike mammals, they don’t burn huge amounts of energy constantly, meaning they require far less food relative to their size.

Which explains why a snake can eat one mouse and then spend the next week acting like it has completed life’s major objectives.

From wild fields to living rooms

Corn snakes entered the pet trade during the mid-1960s, particularly throughout North America where wild specimens were frequently collected.

Their manageable size, calm temperament, and ease of feeding quickly made them popular in captivity. Once captive breeding became widespread, corn snakes spread rapidly throughout the reptile hobby—and occasionally into ecosystems where they absolutely weren’t invited.

Small invasive populations now exist in parts of mainland Europe, the Caribbean, Hawaii, and even Australia. Which is impressive considering Australia already contains enough snakes to make most snake lovers nervous.

Captive breeding also produced an enormous variety of morphs and colour mutations. There are now more than 800 recognised corn snake morphs, ranging from bright reds and oranges to ghostly whites and silvers.

Some morphs, however, carry genetic problems caused by poor breeding practices or excessive inbreeding, including:

• Spinal kinks
• Stargazing neurological issues
• Jaw deformities
• Enlarged “bug” eyes
• Lower hatchling survival rates

Thankfully, responsible breeders now place far greater emphasis on health and genetics alongside appearance.

Because a healthy snake is much more important than one that happens to resemble a strawberry milkshake.

What’s the snake doing?

Corn snakes may not be as expressive as lizards, but they still display a wide range of behaviours that can tell you exactly how they’re feeling.

• Tongue flicking

The snake is actively smelling the air and assessing its environment. Snakes “smell” using their tongues and a specialised organ in the roof of the mouth called the Jacobson’s organ.

Basically, every tongue flick is the snake downloading environmental information.

• Completely still, no tongue flicking

The snake is probably asleep. Since snakes don’t have eyelids, this can occasionally make them look awake and judgmental even when unconscious.

• Head and neck held in an “S” shape

The snake is preparing to strike—either defensively or at prey.

Not necessarily aggressive.
But definitely focused.

• Hissing

Usually paired with defensive posture. The snake is politely requesting that you leave it alone before it escalates the situation.

• Tail shaking/rattling

Corn snakes vibrate their tails to imitate rattlesnakes and scare away predators.

It’s essentially reptilian bluffing:
“I could be dangerous. Are you willing to risk finding out?”

• Musking/defecating

The snake feels threatened and releases foul-smelling musk or waste in an attempt to distract predators and escape.

A surprisingly effective strategy.
A deeply unpleasant one.
But effective.

• Bluish eyes and dull colours

The snake is entering shed. A fluid layer develops between the old and new skin, giving the eyes a cloudy blue appearance.

This phase is often referred to as “being in blue,” and snakes tend to become more defensive during this time because their vision is reduced.

Imagine wearing fogged-up swimming goggles for several days and you’ll understand the mood.

• Restlessness/glass surfing

This can indicate excessive heat, hunger, breeding behaviour, or general curiosity.

Corn snakes are surprisingly active animals and often spend the night exploring every square inch of their enclosure like tiny escape artists with scales.

• Jumpy or tense behaviour

An agitated or nervous snake. Sudden movements may startle it, and handling should be approached calmly and slowly.

• Flighty behaviour

The snake is stressed and trying to escape handling. Respect this behaviour—otherwise the next lesson may involve discovering exactly how sharp tiny snake teeth are.

The best pet snake?

Corn snakes are one of the most popular pet snakes in the world for very good reason.

They stay at a manageable size, are generally calm and easy to handle, come in an incredible range of colours and patterns, and adapt very well to captivity when properly cared for.

They also suffer from relatively few health issues, eat infrequently, and are inexpensive to maintain once their enclosure is set up correctly.

In many ways, they are the perfect introduction to snake keeping:
Hardy, beautiful, curious, and just dramatic enough to keep things interesting.

Plus, there’s something undeniably impressive about owning an animal that can unhinge its face to eat dinner

For some tips and tricks check out our YouTube channel we have some fun videos with our animals and herptile care!