{{Short description|Species of snake}} {{Speciesbox | image = Trimeresurus mcgregori.jpg | image_caption = Captive-bred adult female | status = EN | status_system = IUCN3.1 | status_ref = <ref name=iucn>{{cite iucn |author=Sy, E. |author2=Diesmos, A.C. |author3=Brown, R. |author4=Siler, C. |year=2022 |title=''Trimeresurus mcgregori'' |volume=2022 |article-number=e.T169876A195201742 |doi=10.2305/IUCN.UK.2022-2.RLTS.T169876A195201742.en |access-date=21 March 2026}}</ref> | genus = Trimeresurus | species = mcgregori | authority = [[Edward Harrison Taylor|Taylor]], 1919 | range_map = Trimeresurus mcgregori distribution.png | synonyms = * ''Trimeresurus mcgregori'' <br />{{small|Taylor, 1919}} * ''Trimeresurus flavomaculatus mcgregori'' <br />{{small|— [[Alan Edward Leviton|Leviton]], 1961}}<ref name="McD99">[[Roy Wallace McDiarmid|McDiarmid RW]], [[Jonathan A. Campbell|Campbell JA]], [[T'Shaka A. Touré|Touré TA]] (1999). ''Snake Species of the World: A Taxonomic and Geographic Reference, Volume 1''. Washington, District of Columbia: Herpetologists' League. 511 pp. {{ISBN|1-893777-00-6}} (series). {{ISBN|1-893777-01-4}} (volume).</ref> * ''Trimeresurus mcgregori'' <br />{{small|— [[species:Andreas Gumprecht|Gumprecht]], 2001}} * ''Parias flavomaculatus mcgregori'' <br />{{small|— [[species:Anita Malhotra|Malhotra]] & [[species:Roger S. Thorpe|Thorpe]], 2004}} * ''Trimeresurus mcgregori'' <br />{{small|— [[species:Chris Mattison|Mattison]], 2007}} * ''Parias mcgregori'' <br />{{small|— [[Nikolai Liutsianovich Orlov|Orlov]] et al., 2009}} * ''Trimeresurus (Parias) mcgregori'' <br />{{small|— [[species:Patrick David|David]] et al., 2011}}<ref>{{EMBL species|genus=Trimeresurus|species=mcgregori}}</ref> }}

'''''Trimeresurus mcgregori''''', [[common name|commonly known]] as '''McGregor's pit viper'''<ref name="Gum04">[[species:Andreas Gumprecht|Gumprecht A]], [[species:Frank Tillack|Tillack F]], [[Nikolai Liutsianovich Orlov|Orlov NL]], [[Ashok Captain|Captain A]], [[Sergei Aleksandrovich Ryabov|Ryabov S]] (2004). ''Asian Pitvipers''. First Edition. Berlin: GeitjeBooks. 368 pp. {{ISBN|3-937975-00-4}}</ref> or the '''Batanes pit viper''', is a [[species]] of [[venomous snake]] in the [[subfamily]] [[Crotalinae]] of the [[Family (taxonomy)|family]] [[Viperidae]].<ref name="ITIS">{{ITIS |id=635223 |taxon=''Trimeresurus flavomaculatus mcgregori'' |access-date=12 August 2008}}</ref><ref name="Gum04"/> The species is [[Endemism|endemic]] to the [[Philippines]].

==Etymology== The [[Specific name (zoology)|specific name]], ''mcgregori'', is in honor of Australian-American ornithologist [[species:Richard Crittenden McGregor|Richard Crittenden McGregor]] (1871–1936), who collected the [[Type (biology)|type specimen]],<ref>[[Bo Beolens|Beolens, Bo]]; [[Michael Watkins (zoologist)|Watkins, Michael]]; [[Michael Grayson|Grayson, Michael]] (2011). ''The Eponym Dictionary of Reptiles''. Baltimore: Johns Hopkins University Press. xiii + 296 pp. {{ISBN|978-1-4214-0135-5}}. (''Trimeresurus mcgregori'', p. 173).</ref> and survived its bite.<ref>[[Edward Harrison Taylor|Taylor]] (1919), p. 112.</ref>

==Description== The scalation of ''Trimeresurus mcgregori'' includes 21 (23) rows of [[dorsal scales]] at midbody, 170-172/173-178 (or 169-172/168-178) [[ventral scales]] in males/females, 62-66/58-60 (or 63-69/56-62) [[subcaudal scales]] in males/females, and 10–11 [[supralabial scales]].<ref name="Gum04"/>

==Geographic range== ''Trimeresurus mcgregori'' is found in the [[Philippines]] on the [[Batanes|Batanes Islands]]. The [[Type locality (biology)|type locality]] given is "[[Batan Island]], Batanes Group, (lying between [[Luzon]] and [[Taiwan|Formosa]])" (Philippine Islands).<ref name="McD99"/>

==Habitat== The preferred natural [[habitat]]s of ''Trimeresurus mcgregori'' are [[forest]] and [[shrubland]], at altitudes from sea level to {{cvt|800|m|ft}}, but it has also been found in agricultural areas.<ref name=iucn/>

==Taxonomy== ''Trimeresurus mcgregori'' was originally described as a new species by [[Edward Harrison Taylor|E.H. Taylor]] in 1919.<ref>Taylor (1919), p. 110.</ref> It was considered to be a [[subspecies]] of ''T. flavomaculatus'' by [[Alan Edward Leviton|Alan E. Leviton]] (1961).<ref name="McD99"/> It was re-elevated to a full species by [[species:Andreas Gumprecht|Andreas Gumprecht]] (2001, 2002).<ref name="Gum04"/>

==References== {{Reflist}}

[[File:Female on eggs.jpg|thumb|alt=T mcgregori female |Breeding female on eggs with hatchlings]]

==Further reading== *[[species:Andreas Gumprecht|Gumprecht A]] (2002). "''Die Bambusottern der Gattung ''Trimeresurus'' [[Bernard Germain de Lacépède|Lacépède]] Tiel V: Die philippinischen Bambusottern des ''Trimeresurus flavomaculatus''-Komplexes II. Die Batanes-Bambusotter ''Trimeresurus mcgregori'' Taylor, 1919'' ". ''Sauria'' '''24''' (3): 31–44. (in German). *Sweeney, Roger (1994). "McGregor's pit viper, ''Trimeresurus flavomaculatus mcgregori'' ". ''Herptile: Journal of the International Herpetological Society'' '''19''' (2): 86–88. *[[Edward Harrison Taylor|Taylor EH]] (1919). "New or rare Philippine reptiles". ''Philippine Journal of Science'' '''14''': 105–125. (''Trimeresurus mcgregori'', new species, pp.&nbsp;110–112.) *[[Jeffrey L. Weinell|Weinell JL]], [[species:Errol Hooper|Hooper E]], [[Alan Edward Leviton|Leviton AE]], [[species:Rafe Marion Brown|Brown RM]] (2019). "Illustrated Key to the Snakes of the Philippines". ''Proceedings of the California Academy of Sciences, Fourth Series'' '''66''' (1): 1–49.

{{Taxonbar|from=Q3539224}}

[[Category:Trimeresurus|mcgregori]] [[Category:Reptiles of the Philippines]] [[Category:Fauna of Batanes]]