How to Identify the Regal Coral Snake (Identification Guide)
A large, highly venomous South American coral snake identified by its bold red, black, and yellow triads and thick body.
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Key identifying features
The Regal Coral Snake (Micrurus surinamensis, sometimes called the Aquatic Coral Snake) is a large, highly venomous elapid identified by its bold triads of black bands bordering wide red sections, separated by yellow rings, and a notably robust, thick body for a coral snake, along with a strong association with water.
Coloration & pattern
The body pattern features broad red bands bordered on each side by black bands, with narrow yellow rings separating the groups, arranged in a repeating triad pattern along the body. The colors are typically vivid and high-contrast. The head is black, often with pale markings just behind it.
Head, eyes & scales
The head is small and rounded, not broad or triangular, consistent with the elapid body plan and distinct from pit vipers. Eyes are small and dark, blending into the dark head coloration. Scales are smooth and glossy across the body.
Size & body shape
This is one of the larger and more heavy-bodied coral snake species, with adults reaching up to about 4 feet in length and a notably thick, muscular body compared to most other coral snakes, an adaptation linked to its more aquatic habits.
Range & habitat where you'll see it
The Regal Coral Snake is found throughout the Amazon basin and Orinoco regions of South America, including Brazil, Venezuela, Colombia, Peru, and the Guianas. Unlike most coral snakes, it is strongly associated with water, frequently found in and around rivers, streams, and flooded forest, where it feeds on aquatic prey.
How to tell it apart from look-alikes
The Regal Coral Snake's unusually thick, robust body and strong association with aquatic habitats help distinguish it from other, more slender, terrestrial coral snake species in the same region. Its triad banding of black-red-black groups separated by yellow rings should be assessed together with its heavier build and near-water habitat, since band order and grouping alone can resemble other regional coral snakes and their mimics.
Frequently asked questions
What makes the Regal Coral Snake different from other coral snakes?
It has an unusually thick, robust body and strong ties to aquatic habitats, being found in and around rivers and flooded forest, unlike most other coral snake species.
How large does the Regal Coral Snake get?
It is one of the larger coral snake species, with adults reaching up to about 4 feet in length.
What is the band pattern of the Regal Coral Snake?
Broad red bands bordered by black bands on each side, separated by narrow yellow rings, arranged in repeating triads.
Where does the Regal Coral Snake live?
In and around rivers, streams, and flooded forest throughout the Amazon and Orinoco basins of South America.