Reptiles
Sonoran Coral Snake
Micruroides euryxanthus · also called western coral snake
After a rare desert rainstorm, a Sonoran coral snake briefly surfaces from its usual hiding place underground, its bold red, yellow, and black bands a clear warning that most desert predators have already learned, whether or not they have ever actually risked testing it.
Overview
The Sonoran coral snake, Micruroides euryxanthus, is a small, secretive, venomous snake native to desert habitat across Arizona, New Mexico, and adjacent Mexico. Its rarely seen, mostly underground lifestyle and unusual tail-popping defensive display make it one of the more behaviourally distinctive venomous snakes in the American Southwest.
A warning pattern rarely put to the test
Despite carrying genuinely potent venom, the Sonoran coral snake spends so much of its life hidden underground that most of its bold warning colouration goes almost entirely unseen, reserved mainly for the rare moments it surfaces after rain.
Status
Least Concern — present across suitable desert habitat throughout the southwestern United States and adjacent Mexico.
Sonoran Coral Snake: common questions
Why does the Sonoran coral snake pop its tail instead of biting?
When threatened, a Sonoran coral snake curls its tail into a tight coil and produces an audible popping sound, a startling defensive display that can surprise or distract a predator, an alternative strategy to striking that the snake appears to rely on more often given its reluctance to bite even when handled.
Is the Sonoran coral snake dangerous to people?
It produces potent neurotoxic venom, but a Sonoran coral snake has a small mouth and is generally reluctant to bite, meaning venom is rarely actually injected into a person even in the rare cases where the snake is handled carelessly, though it should still always be treated with caution and respect.
When is the Sonoran coral snake most likely to be seen?
The Sonoran coral snake is often most active on the surface following rainfall, when humidity briefly rises within its otherwise arid desert habitat, making rainy periods the best time to spot this typically hidden, burrowing species.
Where does the Sonoran coral snake live?
The Sonoran coral snake is native to desert and semi-arid habitat across Arizona, New Mexico, and adjacent Mexico, spending the vast majority of its time hidden underground or beneath surface debris.