Snake Identifier
Semiornate Snake (Philothamnus semivariegatus)
Day 16 Spotted Bush Snake (Philothamnus semivariegatus) (53238317613) by Bernard DUPONT from FRANCE, via Wikimedia Commons, licensed under CC BY-SA 2.0
Colubrids

Semiornate Snake

Philothamnus semivariegatus

A large, patterned African bush snake with cross-barring on the neck, harmless to humans and one of the bigger species in its genus.

Venomous?
Non-venomous
Adult length
0.9-1.5 m (3-5 ft)
Range
Sub-Saharan Africa

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Overview

The Semiornate Snake, more commonly called the Variable Bush Snake, is one of the larger and more distinctively patterned members of the African genus Philothamnus. It is widely distributed across savanna and woodland regions of sub-Saharan Africa.

Although often mistaken for more dangerous species due to its size and speed, it is entirely non-venomous and harmless to humans, feeding on small vertebrates within its habitat.

How to identify it

  • Green to olive dorsal coloration with irregular black cross-bars, especially pronounced on the neck and forebody
  • Smooth scales and a slender, elongated body
  • Large eyes with round pupils
  • Long, whip-like tail
  • Pale yellow to white underside

The partial black cross-barring on the neck gives rise to the name "semiornate" and helps distinguish it from plainer Philothamnus species.

Habitat & range

Occupies savanna woodland, riverine forest, and rocky outcrops across much of sub-Saharan Africa, from East Africa through southern Africa. It is highly arboreal but also forages on the ground and among rocks.

Behavior, diet & reproduction

Diurnal and fast-moving, capable of rapid escapes through trees and shrubs. When cornered it may inflate its neck and strike, though bites are not medically significant.

Feeds on a varied diet including lizards (especially chameleons and geckos), frogs, and occasionally small birds. Reproduction is oviparous, with clutches of roughly 4-14 eggs laid during the warmer months.

Frequently asked questions

Is the Semiornate Snake venomous?

No, it is non-venomous, though its bite may cause minor local irritation in rare cases; it is not considered dangerous.

How big does the Semiornate Snake get?

It is one of the larger bush snakes, reaching 0.9-1.5 m (3-5 ft).

Where is the Semiornate Snake found?

It occurs across savanna and woodland regions of sub-Saharan Africa.

What does the Semiornate Snake eat?

It preys on lizards, frogs, and occasionally small birds.