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Common Bridle Snake

01 May

Dryocalamus davisonii

Common Bridle Snake (Dryocalamus davisonii)

Common Bridle Snake in Thailand (photo courtesy of Michael Cota)

Dryocalamus davisonii  Common Bridle Snake Thailand

Common Bridle Snake in Thailand (photo courtesy of Alexandre Roux)

Common Bridle Snake (Dryocalamus davisonii)

Common Bridle Snake in Laos (photo courtesy of Thomas Calame)

Dryocalamus davisonii  Common Bridle Snake Thailand

Head shot of Common Bridle Snake (photo courtesy of Alexandre Roux)

Common Bridle Snake (Dryocalamus davidsonii)

Common Bridle Snake in Vietnam (photo courtesy of Scott Trageser) http://www.naturestills.com

Common Bridle Snake (Dryocalamus davidsonii)

Head shot of Common Bridle Snake (photo courtesy of Scott Trageser) http://www.naturestills.com

Blanford's Bridal Snake Dryocalamus davisonii

Common Bridle Snake found dead on road in Uttaradit Province (photo courtesy of Sjon Hauser)

English name: Common Bridle Snake (aka: “Blanford’s Bridal Snake”)
Scientific name: Dryocalamus davisonii
Thai name: Ngu Plong-chanuan India

Description: To 92cm long. A very slender, vertically narrow snake with a long tail and a depressed head. Body is black with white or pale green crossbands that get closer together as they break up into a reticulated pattern towards the tail. Head is mostly white with a black snout and a narrow black line that runs down the middle of the head towards the body. Underbelly is white.

Similar Species: Common Wolf Snake is not as slender, is wider than it is high, and has less distinct banding.
Banded Krait has a thicker, triangular body. Its light and dark bands are of equal width and remain distinct throughout the body.

Habitat: This forest species is semi-arboreal and can be found in bushes and trees as well as on the ground. Is rather secretive and only comes out at night.

Contribution to the ecosystem: The Common Bridle Snake helps control lizard populations, mostly feeding on geckos. It is eaten by larger snakes.

Danger to humans: This snake rarely bites and is not dangerous to humans.

Conservation status and threats: No known conservation threats. It is not commonly seen in the Bangkok area.

Interesting facts: The Common Bridle Snake and its relatives are referred to as “bridle snakes” due to their narrow bodies and banded coloration, which makes them appear similar to the bridles (reins) used to control horses.

References:
Siam-Info: Dryocalamus
The Reptile Database: Dryocalamus davisonii
Thailand Office of Environmental Planning and Policy: A Checklist of Amphibians and Reptiles in Thailand</a
A Photographic Guide to Snakes and Other Reptiles of Peninsular Malaysia, Singapore and Thailand
A Field Guide to the Reptiles of South-East Asia
A Field Guide to the Snakes of South Vietnam

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