African Twig Snake
Thelotornis capensis • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Thelotornis, Species: Thelotornis capensis
Venomous Status
Venomous (medically significant); Opisthoglyphous (rear-fanged).
Danger Level
Extremely Dangerous. Though rear-fanged, the venom is potent with no known effective antivenom. Bites can be fatal to humans if not managed correctly.
Geographic Range
Southern and East Africa, including South Africa, Zimbabwe, Botswana, Mozambique, Malawi, and Tanzania; typically found in savanna and woodland regions.
Conservation Status
Least Concern (IUCN). Locally common, though habitat loss is a generalized threat across its range.
Physical Description
Extremely slender with an elongated, pointed head. Cryptic coloration mimics bark or vines, featuring a mosaic of grey, brown, green, and pink-to-orange flecks. The pupils are key-hole or horizontal shaped, which is unusual for snakes.
Size & Dimensions
The specimen appears to be an adult, approximately 60-90 cm in length. Maximum recorded length for the species is around 120 cm.
Habitat
Predominantly arboreal; lives in low bushes and trees within savannas, coastal forests, and woodlands. Often found blended into branches or thick foliage.
Behavior & Temperament
Diurnal and highly cryptic. It remains motionless for long periods to ambush prey. When threatened, it inflates its neck (throat) to display vivid, dark markings as a warning.
Diet & Feeding
Specialized feeder focusing on lizards (especially chameleons), frogs, and occasionally small birds. Uses sit-and-wait ambush tactics and envenomation.
Reproduction
Oviparous (egg-laying). Females lay clutches of 4 to 13 elongated eggs during the summer months; hatchlings are independent from birth.
Venom & Safety
Venom Type
Highly hemotoxic; contains procoagulants that cause extensive internal bleeding, consumption coagulopathy, and hemorrhaging.
First Aid Advice
Seek immediate hospital admission. Do not use a pressure bandage as it may localize tissue damage; keep the patient still. Traditional antivenom is NOT effective against Thelotornis venom. Fresh frozen plasma or blood transfusions may be required.
Look-alikes
Often confused with Vine Snakes of the genus Oxybelis (Americas) or Boomslangs (Dispholidus typus). Distinguished from Boomslangs by its horizontal pupils and more elongated, pointed snout.
Conservation Status
Least Concern (IUCN). Locally common, though habitat loss is a generalized threat across its range.
Cultural Significance
Known as 'Bird Snakes' or 'Vine Snakes' in English and 'Voëlslang' in Afrikaans. Ecologically vital for controlling lizard and amphibian populations in African savannas.
Notable Features
Possesses binocular vision due to the horizontal pupil shape and a groove along the snout, an extremely rare trait in snakes that allows for precise distance estimation when striking.