{{Short description|Species of snake}} {{Speciesbox | image = Trimeresurus borneensis.jpg | status = LC | status_system = IUCN3.1 | status_ref = <ref name=IUCN>{{Cite journal | author = Iskandar, D. | author2 = Vogel, G. | author3 = Auliya, M. | author4 = Das, I. | author5 = Inger, R.F. | name-list-style = amp | title = ''Trimeresurus borneensis'' | journal = [[The IUCN Red List of Threatened Species]] | volume = 2012 | page = e.T191943A2019169 | publisher = [[IUCN]] | date = 2012 | url = http://www.iucnredlist.org/details/191943/0 | doi = 10.2305/IUCN.UK.2012-1.RLTS.T191943A2019169.en | access-date = 10 January 2018| doi-access = free }}</ref> | genus = Craspedocephalus | species = borneensis | authority = ([[Wilhelm Peters|W. Peters]], 1872) | synonyms= *''Atropophis borneensis'' <br/><small>W. Peters, 1872</small> *''Bothrops sandakanensis'' <br/><small>Lidth de Jeude, 1893</small> *''Lachesis borneensis'' <br/><small>– [[George Albert Boulenger|Boulenger]], 1896</small> *''Trimeresurus borneensis'' <br/><small>– [[Thomas Barbour|Barbour]], 1912</small><ref name=McD99>McDiarmid RW, [[Jonathan A. Campbell|Campbell JA]], Touré T. 1999. ''Snake Species of the World: A Taxonomic and Geographic Reference, Volume 1''. Herpetologists' League. 511 pp. {{ISBN|1-893777-00-6}} (series). {{ISBN|1-893777-01-4}} (volume).</ref> *''Trimeresurus (Craspedocephalus) borneensis'' <small>– David et al., 2011</small><ref name=NRDB>{{NRDB species|genus=Trimeresurus|species=borneensis|date=28 July|year=2008}}</ref> }}
'''''Craspedocephalus borneensis''''', [[common name|commonly known]] as the '''Bornean pit viper''',<ref name=Gum04>Gumprecht A, Tillack F, [[Nikolai Liutsianovich Orlov|Orlov NL]], [[Ashok Captain|Captain A]], Ryabov S. 2004. ''Asian Pit vipers''. GeitjeBooks Berlin. 1st Edition. 368 pp. {{ISBN|3-937975-00-4}}.</ref> is a [[venomous snake|venomous]] [[pit viper]] [[species]] [[endemic]] to the island of [[Borneo]].<ref name=IUCN/> No [[subspecies]] are currently recognized.<ref name=NRDB/><ref name="ITIS">{{ITIS|id=634905|taxon=''Trimeresurus borneensis''|accessdate=28 July 2008}}</ref>
==Description== Scalation includes 19–21 rows of [[dorsal scales]] at midbody, 152–180 [[ventral scales]], undivided anal scale, 45–58 divided [[subcaudal scales]], and 8–11 [[supralabial scales]].<ref name=Gum04/>
Its coloration varies. Individuals may be brown with darker brown saddles, or light brown with a few darker markings, or even bright yellow with darker markings.
Adults may attain {{convert|83|cm|in|abbr=on}} in snout-vent length (SVL).<ref name=Das2006>Das, Indraneil. 2006. ''A Photographic Guide to Snakes and Other Reptiles of Borneo''. Ralph Curtis Books. Sanibel Island, Florida. 144 pp. {{ISBN|0-88359-061-1}}. (''Trimeresurus borneensis'', p. 57.)</ref>
==Geographic range== ''Craspedocephalus borneensis'' is found on the island of [[Borneo]] ([[Brunei]], [[Kalimantan]], [[Sabah]], [[Sarawak]]) as well as in the [[Natuna Islands]].<ref name=IUCN/>
The [[Type locality (biology)|type locality]] given is ''"Sarawack"'' (= [[Sarawak]], [[Borneo]]).<ref name=McD99/>
==Habitat== It is found in [[forest]]s below an altitude of {{convert|1,130|m|ft|abbr=on}}. Even though the tail is [[prehensile]], adults are usually on the forest floor. Juveniles may be in low vegetation.<ref name=Das2006/>
==Diet== ''Craspedocephalus borneensis'' preys upon small rodents and small birds.<ref name=IUCN/>
==Reproduction== Whether this species of ''Craspedocephalus'' lays eggs or bears live young is as yet unknown.<ref name=Das2006/>
==References== {{Reflist|2}}
==Further reading== *[[Wilhelm Peters|Peters, W.]] 1872. ''Übersicht der von den Herren M.se G. Doria und D.r O. Beccari in Sarawack auf Borneo von 1865 bis 1868 gesammelten Amphibien''. Annali del Museo Civico di Storia Naturale di Genova, Series 1, '''3''': 27-45. (''"Atropophis borneensis'' n. sp.", pp. 41–42.)
{{Taxonbar|from=Q3010380}}
[[Category:Reptiles described in 1872]] [[Category:Taxa named by Wilhelm Peters]] [[Category:Craspedocephalus|borneensis]] [[Category:Endemic fauna of Borneo]] [[Category:Reptiles of Brunei]] [[Category:Snakes of Indonesia]] [[Category:Snakes of Malaysia]] [[Category:Reptiles of Borneo]]