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Do Snakes Eat Frogs?

Yellow Viper eating frog_Mark Kostich_Shutterstock

Snakes are often seen as one of the most frightening animals to humans; should frogs be scared of them too? Snakes are obligate carnivores, and their diet heavily depends on prey availability. In areas where these two species coexist, a snake can eat a frog, though it might not happen as often as you think. Let’s find out why.

divider-snakeThe Snake Diet

Obligate carnivores are species that cannot survive on an alternative diet. Based on their physiology, reptiles such as snakes have very strict dietary requirements that make them unable to subsist on another animal’s diet or plant matter. While they can eat it once in a while, this is not something that they could do for long periods due to their inability to digest it.

Because of this, they need prey that is usually the same size or smaller than themselves. This has also affected their hunting behavior as these animals will use ambush and constriction techniques to catch them.

Snake and frog_C.Aphirak_Shutterstock
Image Credit: C. Aphirak, Shutterstock

Why Do Snakes Eat Frogs?

Frogs are easy prey for snakes. Snakes do not have teeth, so they can’t chew food and swallow it. Instead, they need to use their long sharp tongues to push the frog’s body down its throat whole. To do this successfully, a snake has two methods – striking or constricting. A snake will usually strike at the frog and catch it with its mouth or narrow it by coiling it before suffocating it.

What Happens If a Snake Eats a Frog?

If a snake doesn’t do anything with its prey immediately after catching it, then the frog will try to escape or fight back by attacking the snake’s head by trying to bite it. Since this is also not effective against an animal that has no teeth or mouth muscles, the snake will just swallow the helpless frog whole (or part of it if it tried to escape). A reptile’s stomach cannot digest solid foods, so the frog will either be digested over time or regurgitated almost immediately if the snake tries too hard to eat it.

A snake will likely try and avoid eating frogs as they are very tricky targets. Although they can eat them if they need to, many other animals are easier prey for a snake to hunt down. Some frogs may still have toxic secretions on their skin (like the poison dart frog) which could cause symptoms ranging from breathing problems to paralysis in any animal that eats them. This would also include most snakes!

What Types of Snakes Eat Frogs?

Snakes will naturally eat all kinds of animals. Most snakes that are known to eat frogs are not venomous and belong to the Colubridae family. Snakes from this family are usually small, slender, and nonvenomous. Some examples include the eastern red-bellied snake (Storeria occipitomaculata), the ringneck snake (Diadophis punctatus), and the common garter snake (Thamnophis sirtalis).

Another type of frog eater is the larger snake that doesn’t need venom to attack prey, such as pythons from Australia or anacondas. Pythons do constrict their meals, but they also swallow their food whole. A python can eat an animal two or three times its size, so it’s no surprise that they can also swallow something as large as a frog.

Well-known frogs eaten by snakes include the North American bullfrog and leopard frog (Rana pipiens). In contrast, the European green toad (Bufo viridis), African dwarf frog (Hymenochirus boettgeri), and cane toad are often preyed on by pythons. They are easier for them to catch as they move slower due to being larger than other species of tadpoles. Pythons can also smell eggs inside female frogs, which makes them easier prey.

Black Snake Eating frog_Volodymyr Burdiak_Shutterstock
Image Credit: Volodymyr Burdiak, Shutterstock

How Do Frogs Defend Themselves from Snakes?

Frogs have a number of defense mechanisms that they can use to protect themselves from predators. Most frogs are small and agile enough to escape most predators, especially those that hunt by sight. Their slippery skin also helps them getaway as it makes them harder to grab onto or hold on to. If a frog is too large for a snake or lizard, they will try the following methods:

  • Blanching: This is when a frog takes up its defensive coloration by turning white, which is visible to potential predators. Blanching can be triggered either by heat (thermal blanching) or another stimulus such as light, noise, or touch (tactile blanching). Once this happens, there’s less chance of lizards and snakes attacking it, as they are less likely to be able to tell that the frog is poisonous. In this state, a frog will also fall silent and slow down its movements to not attract attention.
  • Darting: Another defensive technique used by frogs and toads is by darting into the water when attacked or threatened. Most amphibians are poor swimmers, but their long limbs help them move quickly through the water if needed.
  • Jumping: They have strong hind legs that allow them to jump distances up to 3 feet. This is known as metachronal locomotion, which works in much the same way as an eel’s lateral undulation towards prey.
  • Playing Dead: Frogs can also try ‘playing dead’ when in danger. They will stop moving and fall flat on their backs when they find themselves in this situation. If the attacker doesn’t leave, the frog will return to its normal position after a few minutes.

Can Frogs eat Snakes?

Nature is a chaotic place, and sometimes the hunter becomes the hunted. Some giant frogs eat snakes, and they can do it in their own way. The African giant frog (Pyxicephalus adspersus) is a large arboreal species that are known to eat up to 10 times its body weight in lizards, frogs, toads, and small mammals.

Most of the time, though, these giant frogs will kick their prey out of trees or swallow them whole. They might later regurgitate indigestible parts near water sources for other animals, including birds and fish, to feed on. Frogs are not likely to stalk and ambush snakes like eagles or ocelots do because they’re not fast enough. It has been observed in some species of frogs that once they catch one, they will start to swallow it only to stop when they realize that they aren’t their usual food of insects or small animals.

Snake Eating frog_Mari Nuffer_Shutterstock
Image Credit: Mari Nuffer, Shutterstock

What Else Do Snakes Eat?

Though snakes are reptiles, most of them have a varied diet that includes any other animal or four-legged creature smaller than themselves. They eat rats, mice, lizards, and frogs regularly but would not usually pass up an opportunity to hunt for something larger like a bird, small deer, goat, or dog if the chance should come by.

When given the option between two choices of equal sizes, such as an opossum and a rabbit, they will almost always go for the bigger meal. “A snake is just happy to eat,” said Marshal Hedin, reptile conservation coordinator at the California Department of Fish and Game. “If you put a snake in the wild that had never eaten anything, it would be just as happy to eat a frog as it would be a mouse.


Snakes most definitely do eat other types of frogs, but it’s not usually their first choice. They prefer to go after bigger prey like humans and large animals to enjoy the taste. The main difference between snakes and larger predators that hunt by sight is that most reptiles don’t need to see their victims catch up with it. Snakes will just lie in wait for its dinner to come along without ever knowing where it came from or even noticing it was there.

This is why snakes are often excellent pets: they never complain about how much you feed them, and they only require a small area in which to live, unlike dogs and cats who may need a nice big yard for running around if given a choice.

Featured Image Credit: Mark Kostich, Shutterstock

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