Snake Identifier
Forsten's Cat Snake (Boiga forsteni)
Davidraju Forsterns vat by Davidvraju, via Wikimedia Commons, licensed under CC BY-SA 4.0
Colubrids

Forsten's Cat Snake

Boiga forsteni

A large, powerfully built cat snake found in India and Sri Lanka, known for its bold blotched pattern and strong climbing ability.

Venomous?
Mildly venomous
Adult length
1.2-1.8 m (4-6 ft)
Range
Indian subcontinent and Sri Lanka

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Overview

Forsten's cat snake is a large, robust member of the genus Boiga found in forested and rocky regions of the Indian subcontinent and Sri Lanka. It is among the larger cat snakes in South Asia and is recognized for its strength and boldly marked body.

It is an agile nocturnal climber found in both forest and rocky habitats, preying on a variety of vertebrates.

As a rear-fanged species, it is mildly venomous, with bites capable of causing localized swelling but not considered dangerous to healthy adults.

How to identify it

  • Large, muscular body, brown to grayish-brown with dark, irregular blotches or crossbands
  • Broad, distinct head with large, vertically elliptical pupils
  • Smooth scales and a somewhat compressed body suited to climbing
  • Pale cream to yellowish venter
  • Long, prehensile tail

Distinguished from other regional cat snakes by its larger size and heavier build, along with bold blotched patterning.

Habitat & range

Occupies forests, rocky hillsides, and scrublands across peninsular India, the Western Ghats, and Sri Lanka. It is a capable climber, using both trees and rocky crevices, and is also found on the ground.

It occurs from lowlands into hill forests, tolerating a range of habitat types.

Behavior, diet & reproduction

Nocturnal, hunting at night and sheltering in tree hollows, rock crevices, or dense vegetation during the day. It can be defensive when cornered, coiling and posturing readily.

Its diet includes birds, small mammals, lizards, and bats, subdued with mildly venomous rear fangs. It is oviparous, laying clutches of several eggs.

Frequently asked questions

Is Forsten's cat snake venomous?

It is mildly venomous with rear fangs, but not considered dangerous to healthy adults.

How big does Forsten's cat snake get?

It is a large cat snake, reaching 1.2-1.8 m (4-6 ft).

Where is Forsten's cat snake found?

It occurs in India, including the Western Ghats, and in Sri Lanka.

What does Forsten's cat snake eat?

It preys on birds, small mammals, lizards, and bats.