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Text and photos by Nick Baker, unless otherwise credited.
Copyright ゥ Ecology Asia 2021



Nganson Bronzeback

Species: Dendrelaphis ngansonensis
Maximum Size : 150 cm

Dendrelaphis ngansonensis inhabits various types of forest in parts of Indochina, from the lowlands to at least 1500 metres. It is mainly diurnal in habits, and is strongly arboreal: little else is known of its ecology.

The species was formerly considered a form of Dendrelaphis pictus (Painted Bronzeback), but in recent years was elevated to full species status (Ziegler & Vogel, 1999). It is also known as 'Vietnamese Bronzeback'.

This large species of bronzeback reaches up to 1.5 metres in total length. Its body is robust, and its eyes are large. In the field, this snake can be identified by the broad, black stripe immediately behind the eye, which quickly tapers out at the shoulder. The dorsum is medium brown with pale and dark brown mottling: some scales may have bluish edges. The underside of the head and body is typically cream.

IUCN lists the range of this species as Vietnam, Laos (mainly in the east and south), parts of southern China and Thailand (Chanthaburi province). Other sources include Khao Yai National Park, Nakhon Ratchasima, Thailand in its range, which is where these images were taken.

Figs 1 to 3 : Example from Khao Yai National Park, Nakhon Ratchasima, Thailand, found by day resting on the narrow branches of a sapling.

All photos thanks to Ngo Kang Min.

References :

Ziegler, T. & Vogel, G.  (1999). On the knowledge and specific status of Dendrelaphis ngansonensis (Bourret, 1935) (Reptilia: Serpentes: Colubridae). Russ. J. Herpetol. 6 (3): 199-208


Fig 1
ゥ  Ngo Kang Min
Fig 2
ゥ  Ngo Kang Min
Fig 3
ゥ  Ngo Kang Min