Boomslang: The Rear-Fanged Snake with a Deadly Bite and Bright Green Camouflage

Common Name(s): Boomslang, Tree Snake, Common African Tree Snake

Scientific Name: Dispholidus typus

Type: Reptile – Snake (Colubridae family) – Venomous (rear-fanged, hemotoxic)

Origin and Distribution: Native exclusively to sub-Saharan Africa. Widespread from Senegal and Sudan south to South Africa and Eswatini. Absent from dense rainforests and extreme deserts.

Habitat: Trees, bushes, and shrubs in savannas, woodlands, riverine forests, and coastal thickets. Highly arboreal — rarely seen on the ground; prefers dense vegetation for camouflage and hunting.

Physical Description: Slender, long snake: adults 1–1.8 m (record 2.6 m). Males usually bright emerald green (females often brown or olive). Large eyes with round pupils, short blunt head. Rear fangs (located far back in mouth) deliver potent hemotoxic venom. Scales keeled (rough texture). Tongue bright red.

History and Cultural Significance: Name “boomslang” means “tree snake” in Afrikaans. Feared for potent venom and ability to open mouth 170° to bite. Responsible for one of the most famous herpetological deaths (Karl Schmidt in 1957 — he documented his own symptoms after a bite). Symbol of hidden danger in African bush.

Behavior and Lifestyle: Diurnal and arboreal. Excellent climber; hunts by stealth from branches — preys on chameleons, lizards, birds, eggs, and small mammals. Venom causes severe internal bleeding (delayed onset 5–48 hours). Shy and non-aggressive — bites only if handled or cornered. Oviparous (lays 10–25 eggs).

Conservation Status and Threats: Least Concern (IUCN). Wide distribution and adaptable; no major population declines. Local threats include habitat loss and persecution (killed on sight due to fear). Not considered endangered.

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Fun Facts / Did You Know? • Can open its mouth almost 170° (nearly flat) to bite — unique among snakes. • Venom is extremely potent (more toxic than many cobras), but rear fangs make bites rare unless provoked. • Males are bright green for camouflage in foliage; females often brown for better blending in dry areas. • One of the few rear-fanged colubrids dangerous to humans — most are harmless. • Tongue flicking is bright red — visible from a distance when hunting.

Best Places to See It in the Wild: Kruger National Park (South Africa — common in trees), Hluhluwe-iMfolozi Park (South Africa), Mana Pools (Zimbabwe), South Luangwa National Park (Zambia), with experienced guides on walking safaris (they’re often high in branches).

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