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Sabah Pit Viper
www.matthieu-berroneau.fr

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Borenan Dark-necked Slug Snake (Asthenodipsas borneensis)

https://youtu.be/071uogTZ1Ro

Range: The island of Borneo.

Habitat: Mature forest.

Place in the ecosystem: The Bornean Dark-necked Slug Snake and its close relative the Malayan Slug Snake are unique among slug snakes in that they appears to feed exclusively on slugs and not snails. This could be why unlike other slug snake species they shows no asymmetry in its jaw and tooth structure.

The Bornean Dark-necked Slug Snake was once considered the same species as the Malayan Slug Snake (Asthenodipsas malaccana) despite quite clear visible differences. A January 2020 paper by Quah et al. described them as distinct species for the first time.

in the absence of a trunk or stone to lean on, a capybara may be an option;
I have observed these two individuals do this twice;

see also
https://www.inaturalist.org/journal/nelson_wisnik/21258-the-friendly-capybara

6 Males calling antiphonally in a ~20m stretch of river. Call sites under rocks within the stream itself. Female and juveniles found nearby calling males. No eggs found. Rain in the days preceding. Conditions windy, drizzle, a relatively warm winter night.

Habitat shots taken several months before, after the initial floods.

same as https://www.inaturalist.org/observations/175904449

6 Males calling antiphonally in a ~20m stretch of river. Call sites under rocks within the stream itself. Female and juveniles found nearby calling males. No eggs found. Rain in the days preceding. Conditions windy, drizzle, a relatively warm winter night.