How to Identify a Coral Snake — and Tell It From Its Harmless Mimics
The coral snake is one of North America's most venomous snakes, yet it looks a lot like several completely harmless species. The famous rhyme helps — but only in the U.S., and only if you know its limits. Here's how to identify a coral snake, use the color rule correctly, and separate it from its mimics.
The band order: "red touches yellow"
A U.S. coral snake has smooth, glossy bands that fully encircle the body in the order red, yellow, black, yellow, red — so the red and yellow bands touch. That's the basis of the rhyme: "red touches yellow, kills a fellow; red touches black, friend of Jack." On harmless mimics like the scarlet kingsnake and scarlet snake, red touches black instead. Another tell: the coral snake's snout is black, and its bands wrap all the way around the belly, whereas many mimics have lighter or blotchy bellies.
Important limit: the "red touches yellow" rule only applies to coral snakes in the United States. Coral snakes in Mexico, Central, and South America can have completely different band arrangements, so the rhyme is dangerous to rely on outside the U.S. When you're unsure — or anywhere abroad — treat any brightly banded snake as venomous.
Shape and behavior
Coral snakes are slender with a small, blunt, rounded head barely wider than the neck and small dark eyes with round pupils — none of the triangular-head, cat-eye, or facial-pit features of pit vipers (coral snakes are elapids, related to cobras, not pit vipers). They're secretive and spend much of their time underground or in leaf litter, so encounters are less common. They rarely strike and their fangs are small, but their venom is potent, so they are never to be handled.
The mimics
The scarlet kingsnake and scarlet snake are the classic harmless look-alikes, both banded red, black, and yellow/white but with red touching black. The scarlet snake also has a red snout (versus the coral snake's black snout) and a plain belly. Because a quick glance in leaf litter is easy to get wrong — and the stakes are high — a photo identification is far safer than trying to recall the rhyme under pressure.
Check safely from a photo
Photograph the snake from a safe distance and run it through our free snake identifier, which reads the band order and species for you and flags venom status — no rhyme-recall required. For a guaranteed venomous / non-venomous verdict, snakebite first aid, and a species-by-state database, use Snake Pro. For the bigger picture, see how to tell if a snake is venomous.
Coral snake or harmless mimic?
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Identify a Snake FreeFrequently Asked Questions
What does the "red touches yellow" rule mean?
In the U.S., a venomous coral snake has red and yellow bands touching (red, yellow, black, yellow, red), captured by "red touches yellow, kills a fellow." Harmless mimics like the scarlet kingsnake have red touching black. The rule only works for U.S. coral snakes — it fails for coral snakes elsewhere in the world.
How is a coral snake different from a scarlet kingsnake?
A coral snake has red bands touching yellow bands and a black snout; the harmless scarlet kingsnake has red bands touching black bands. Both are slender and banded, so when in doubt, identify from a photo rather than guessing.
Does a coral snake have a triangular head?
No. Coral snakes have small, rounded, blunt heads barely wider than the neck and round pupils — they are elapids (related to cobras), not pit vipers. This is a key reason the "triangular head means venomous" rule is unreliable.