Whip Snakes

Southeast Asia Snakes

Snakes ~ Whip Snakes

Whip snakes are a common snake species distributed throughout Southeast Asia in lowland to mid-level rainforests, occuring in Malaysia, Thailand, Singapore, Borneo and Indonesia. They are diurnal and arboreal snakes that feed primarily on geckos, agamids and other small lizards. Their slender bodies and sharp snouts are suited for moving through vines, branches and other jungle foliage.

In Peninsular Malaysia, two whip snake species are recognised; Ahaetulla prasina (oriental whip snake) and Ahaetulla mycterizans (Malayan vine snake). Ahaetulla prasina grows up to 2 meters and its base colouration is usually bright or bluish green, though gray forms do occur. A yellow or white ventrolateral line is present. The anal shield is divided in prasina.

Ahaetulla mycterizans is virtually identical but remains smaller (up to 1 meter) and possesses a single anal shield. Both have a yellow or white line at the edge of the ventrals. When agitated, whip snakes curl into a striking position and reveal black and white chequered patternings on the neck region. Whip snakes are live-bearers and neonates are yellowish. This colour eventually fades into green as they mature.

Specimens obtained here that appear to be Ahaetulla fasciolata, or the speckle-headed whip snake, differ morphologically in terms of banding colouration and spot patterning from the Thailand holotype. The last picture on the bottom left portrays an example of such a specimen. Hence, it is ambiguous as to whether this form is just a phase, or a completely different species. The author suggests that an urgent review is needed for the Ahaetulla complex in Southeast Asia.