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Calloselasma rhodostoma

Malayan Pitviper

Venomous 💀💀💀💀 Very dangerous bite ref
Images automatically provided by Flickr & iNaturalist. Sporadic false assignment does occur.


A territorial snake that will rely on its camouflage when humans approach. Will strike readily, causes many fatalities and severe envenomations in its distribution area.
  • Length Adult

  • up to 120 cm ref
  • Length Newborn

  • 13 to 20 cm ref
  • Reproduction

  • oviparous ref
  • Pupil Shape (when closed!)

  • slit (or vertical elliptical) ref
  • Fangs

  • foldable ref front-fanged ref

Altitude range

Vertical distribution

0 to 2000 meter above sea level (a.s.l.) ref

Subspecies & Common Names

Calloselasma rhodostoma  DUTCH Maleise Mocassinslang, ENGLISH Malayan Pitviper, GERMAN Malaiische Mokassin Grubenotter, Malayische Mokassinotter, Malayische Mokassinschlange, INDONESIAN Ular Bandotan Bedor, Ular Biludak, Ular Gebuk, Ular Tanah, ITALIAN Ancistrodonte Della Malesia, MALAY Ular Kapak Bodoh, Ular Kapak Daun, THAI Ngu Maaw Sao, UNCODED LANGUAGES Ngu Kaba, Ngu Kapa, Oraj Lemah, Ulah Kapak Bodoh, Ularkapak Daun ref

Full Taxonomy

  • I. Superfamily Colubroidea

  • Colubrids, elapids and vipers
  • II. Family Viperidae

  • Vipers and pit vipers
  • III. Subfamily Crotalinae

  • Pit vipers
  • IV. Genus Calloselasma

  • Malayan pitvipers
  • V. Species Calloselasma rhodostoma

  • Malayan pitviper
  • VI. snakeID

  • 231
Look up complete taxonomic records of Calloselasma rhodostoma (including synonyms) at THE REPTILE DATABASE (by Peter Uetz et al).