How to Identify the Clark's Coral Snake (Identification Guide)

Key identifying features

Clark's Coral Snake (Micrurus clarki) is a small to medium-sized elapid found from Costa Rica and Panama into the Pacific lowlands of northwestern South America. Like other New World coral snakes, its most reliable identifying trait is a full-body pattern of complete rings that wrap uniformly around the trunk and tail, rather than a pattern confined to the back. The rings occur in a repeating triad sequence, and the snake has a smooth, glossy, cylindrical body typical of coral snakes.

Coloration & pattern

The body displays broad red bands separated by narrower black bands, with each black band bordered on both sides by thin pale yellow or cream rings. This creates the classic "red touches yellow" triad pattern associated with dangerous New World coral snakes. The red bands are often flecked lightly with black stippling, and the yellow rings remain narrow and crisp compared to the wider red and black segments. The pattern is consistent along the length of the body and continues onto the short tail.

Head, eyes & scales

The head is small, rounded, and barely distinct from the neck, a feature shared by most coral snakes and one that helps separate them from many mimics with more triangular, wide heads. The snout is typically black, extending back over the top of the head before the first yellow ring appears. Eyes are small and dark, blending into the black head coloration and offering little visual contrast. Scales are smooth and glossy, without keels, giving the body a polished sheen.

Size & body shape

Clark's Coral Snake is slender-bodied with a fairly uniform diameter from neck to vent, tapering only slightly at the short, thin tail. Adults typically reach modest lengths for the genus, generally in the range of 50 to 90 centimeters. The body is smooth-scaled and elongated, lacking any pronounced neck constriction or bulky musculature, giving it a streamlined, almost tubular appearance.

Range & habitat where you'll see it

This species inhabits humid lowland and foothill forests from Costa Rica and Panama into the Pacific lowlands of western Colombia and Ecuador. It is a secretive, burrowing to semi-fossorial snake most often found under leaf litter, logs, and forest debris in wet tropical environments. Sightings are infrequent because of its retiring habits, and it is more likely to be encountered after rains or when moving through undisturbed forest edges.

How to tell it apart from look-alikes

Several harmless snakes in its range mimic the tricolor pattern, including certain false coral snakes and milk snake relatives, so pattern sequence and head shape are essential for identification. On Clark's Coral Snake, red bands directly border yellow bands, whereas many mimics show red bands bordered by black on both sides, keeping red separated from yellow entirely. The coral snake's small, non-distinct head and small dark eyes also differ from mimics that often show a more visibly rounded pupil and slightly broader head. Ring completeness is another clue: on true coral snakes the bands wrap fully around the belly, while some mimics have pattern that fades or breaks on the ventral surface.