Snake Identifier
Central American Indigo Snake (Drymarchon melanurus)
Arroyera o Zumbadora (Drymarchon melanurus) (2) by Cesarcasasbiodiversidad, via Wikimedia Commons, licensed under CC BY-SA 4.0
Colubrids

Central American Indigo Snake

Drymarchon melanurus

A large, powerful, non-venomous colubrid related to the eastern indigo snake, with a glossy dark tail and lighter forebody.

Venomous?
Non-venomous
Adult length
1.5-2.4 m (5-8 ft)
Range
Southern Texas through Mexico and Central America

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Overview

The Central American indigo snake is a large, fast-moving colubrid closely related to the eastern indigo snake of the southeastern United States. It ranges from southern Texas through Mexico and into Central America.

Its coloration often shows a gradient from lighter tan or orange at the head to glossy black toward the tail, giving rise to its species name referring to the dark tail.

How to identify it

  • Large, robust body with glossy scales
  • Head and forebody often tan, orange, or reddish, darkening to black toward the tail
  • Smooth scales giving an iridescent sheen
  • Broad head with round pupils
  • Can appear nearly all black in some populations

Habitat & range

Found in a variety of habitats including tropical forests, thorn scrub, and semi-arid regions from southern Texas through Mexico and Central America. Occurs from lowlands to moderate elevations.

Behavior, diet & reproduction

Diurnal and highly active, covering large foraging ranges. Feeds on a broad diet of rodents, birds, reptiles, and amphibians. Lays eggs. Generally non-aggressive but can put on a defensive display if cornered.

Frequently asked questions

Is it venomous?

No, it is non-venomous.

How is it related to the eastern indigo snake?

It is a close relative found further west and south, from Texas through Central America.

Why is it called black-tailed?

Its tail is typically glossy black while the forebody may be lighter tan or orange.

How large can it grow?

Up to about 2.4 m (8 ft), one of the larger colubrids in its range.