Snake Identifier
Radiated Rat Snake (Coelognathus radiatus)
Aggression on display by Drishtant Bidari, via Wikimedia Commons, licensed under CC BY-SA 4.0
Colubrids

Radiated Rat Snake

Coelognathus radiatus

A slender, fast-moving colubrid recognized by the radiating dark stripes across its head, common across South and Southeast Asian lowlands.

Venomous?
Non-venomous
Adult length
1.5-2.0 m (5-6.5 ft)
Range
South and Southeast Asia

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Overview

The radiated rat snake, also called the copperhead racer, is a slender, agile colubrid distributed across South and Southeast Asia. Its common name refers to the distinctive dark stripes radiating outward from the eyes across the head.

This species is non-venomous, though it is known to be quick-tempered and defensive when approached, often bluffing aggressively despite posing no medically significant risk.

It is a frequently encountered snake in open and disturbed habitats throughout much of its range.

How to identify it

The body is tan, olive, or grayish-brown with a coppery hue on the head, and often marked with faint dark stripes running along the front third of the body.

  • Several dark stripes radiating from the eye across the head, giving rise to its name
  • Slender, elongated body built for speed
  • Large eyes with round pupils
  • Smooth dorsal scales
  • Adults typically reach 1.5-2.0 m

Habitat & range

This species favors open, disturbed habitats including grassland, scrubland, agricultural fields, and forest edges at low elevations. It ranges across India, Bangladesh, Myanmar, Thailand, Indochina, and parts of the Malay Peninsula and Indonesia.

Behavior, diet & reproduction

The radiated rat snake is diurnal and extremely fast-moving, often fleeing rapidly when disturbed but capable of an aggressive defensive display involving loud hissing and repeated striking if cornered.

It feeds on rodents, birds, frogs, and other small vertebrates, actively pursuing prey rather than ambushing it. It is oviparous, laying clutches of roughly 6 to 15 eggs.

Frequently asked questions

Is the radiated rat snake venomous?

No, it is non-venomous, although it can be notably defensive and bite readily.

How big does the radiated rat snake get?

Adults typically reach 1.5-2.0 m in length.

Where is the radiated rat snake found?

It ranges across South and Southeast Asia, from India through Indochina to parts of Indonesia.

Why is it called the radiated rat snake?

Its name comes from the dark stripes that radiate outward from the eyes across the head.