Snake Identifier
Elegant Bronzeback (Dendrelaphis formosus)
Dendrelaphis formosus juvenile by Hamas Fathani (Gupt24), via Wikimedia Commons, licensed under CC BY-SA 4.0
Colubrids

Elegant Bronzeback

Dendrelaphis formosus

A vividly colored, slender tree snake of Southeast Asian rainforests, known for its metallic bronze back and striking blue-and-black flanks.

Venomous?
Non-venomous
Adult length
1.0-1.5 m (3.3-5 ft)
Range
Southeast Asia (Indonesia, Malaysia, Thailand region)

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Overview

The elegant bronzeback is a strikingly colored member of the genus Dendrelaphis, native to the rainforests of Southeast Asia. Its combination of a bronze-colored dorsum with contrasting blue and black lateral markings makes it one of the more visually distinctive tree snakes in the region.

It is a fast, agile diurnal predator found in both primary forest and disturbed vegetation, and is a familiar sight to naturalists in its range.

This species is non-venomous and not dangerous to humans.

How to identify it

  • Slender body with a glossy bronze or coppery dorsal color
  • Lower flanks often show blue-black coloration, especially between the scales
  • Large eyes with round pupils and an alert expression
  • Smooth scales and a narrow, elongated head
  • Long, whip-like tail

The blue-tinged flanks and overall bronze sheen distinguish it from plainer bronzeback species in the same range.

Habitat & range

Inhabits lowland and hill rainforests, forest edges, and secondary growth across Malaysia, Indonesia (Sumatra, Borneo, Java), and parts of Thailand. It is primarily arboreal, moving through the forest canopy and understory shrubs.

It tolerates some habitat disturbance, occasionally occurring in plantations and gardens near forest.

Behavior, diet & reproduction

Diurnal and fast-moving, actively hunting through vegetation during daylight hours. It relies on speed and camouflage to evade predators, and may flee rapidly rather than confront a threat.

Diet consists of frogs, lizards, and occasionally small birds. It is oviparous, laying clutches of elongated eggs in moist leaf litter or hollows.

Frequently asked questions

Is the elegant bronzeback venomous?

No, it is non-venomous and not considered dangerous to humans.

Where is the elegant bronzeback found?

It occurs in rainforests of Malaysia, Indonesia, and Thailand.

How can you identify an elegant bronzeback?

Look for its bronze back combined with blue-black coloring on the lower flanks.

What does the elegant bronzeback eat?

It feeds mainly on frogs and lizards.