# Trimeresurus mcgregori

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Species of snake

Trimeresurus mcgregori Captive-bred adult female Conservation status Endangered (IUCN 3.1)[1] Scientific classification Kingdom: Animalia Phylum: Chordata Class: Reptilia Order: Squamata Suborder: Serpentes Family: Viperidae Genus: Trimeresurus Species: T. mcgregori Binomial name Trimeresurus mcgregori Taylor, 1919 Synonyms Trimeresurus mcgregori Taylor, 1919 Trimeresurus flavomaculatus mcgregori — Leviton, 1961[2] Trimeresurus mcgregori — Gumprecht, 2001 Parias flavomaculatus mcgregori — Malhotra & Thorpe, 2004 Trimeresurus mcgregori — Mattison, 2007 Parias mcgregori — Orlov et al., 2009 Trimeresurus (Parias) mcgregori — David et al., 2011[3]

***Trimeresurus mcgregori***, [commonly known](/source/Common_name) as **McGregor's pit viper**[4] or the **Batanes pit viper**, is a [species](/source/Species) of [venomous snake](/source/Venomous_snake) in the [subfamily](/source/Subfamily) [Crotalinae](/source/Crotalinae) of the [family](/source/Family_(taxonomy)) [Viperidae](/source/Viperidae).[5][4] The species is [endemic](/source/Endemism) to the [Philippines](/source/Philippines).

## Etymology

The [specific name](/source/Specific_name_(zoology)), *mcgregori*, is in honor of Australian-American ornithologist [Richard Crittenden McGregor](https://species.wikimedia.org/wiki/Richard_Crittenden_McGregor) (1871–1936), who collected the [type specimen](/source/Type_(biology)),[6] and survived its bite.[7]

## Description

The scalation of *Trimeresurus mcgregori* includes 21 (23) rows of [dorsal scales](/source/Dorsal_scales) at midbody, 170-172/173-178 (or 169-172/168-178) [ventral scales](/source/Ventral_scales) in males/females, 62-66/58-60 (or 63-69/56-62) [subcaudal scales](/source/Subcaudal_scales) in males/females, and 10–11 [supralabial scales](/source/Supralabial_scales).[4]

## Geographic range

*Trimeresurus mcgregori* is found in the [Philippines](/source/Philippines) on the [Batanes Islands](/source/Batanes). The [type locality](/source/Type_locality_(biology)) given is "[Batan Island](/source/Batan_Island), Batanes Group, (lying between [Luzon](/source/Luzon) and [Formosa](/source/Taiwan))" (Philippine Islands).[2]

## Habitat

The preferred natural [habitats](/source/Habitat) of *Trimeresurus mcgregori* are [forest](/source/Forest) and [shrubland](/source/Shrubland), at altitudes from sea level to 800 m (2,600 ft), but it has also been found in agricultural areas.[1]

## Taxonomy

*Trimeresurus mcgregori* was originally described as a new species by [E.H. Taylor](/source/Edward_Harrison_Taylor) in 1919.[8] It was considered to be a [subspecies](/source/Subspecies) of *T. flavomaculatus* by [Alan E. Leviton](/source/Alan_Edward_Leviton) (1961).[2] It was re-elevated to a full species by [Andreas Gumprecht](https://species.wikimedia.org/wiki/Andreas_Gumprecht) (2001, 2002).[4]

## References

1. ^ [***a***](#cite_ref-iucn_1-0) [***b***](#cite_ref-iucn_1-1) Sy, E.; Diesmos, A.C.; Brown, R.; Siler, C. (2022). ["*Trimeresurus mcgregori*"](https://www.iucnredlist.org/species/169876/195201742). *[IUCN Red List of Threatened Species](/source/IUCN_Red_List)*. **2022** e.T169876A195201742. [doi](/source/Doi_(identifier)):[10.2305/IUCN.UK.2022-2.RLTS.T169876A195201742.en](https://doi.org/10.2305%2FIUCN.UK.2022-2.RLTS.T169876A195201742.en). Retrieved 21 March 2026.

1. ^ [***a***](#cite_ref-McD99_2-0) [***b***](#cite_ref-McD99_2-1) [***c***](#cite_ref-McD99_2-2) [McDiarmid RW](/source/Roy_Wallace_McDiarmid), [Campbell JA](/source/Jonathan_A._Campbell), [Touré TA](/source/T'Shaka_A._Tour%C3%A9) (1999). *Snake Species of the World: A Taxonomic and Geographic Reference, Volume 1*. Washington, District of Columbia: Herpetologists' League. 511 pp. [ISBN](/source/ISBN_(identifier)) [1-893777-00-6](https://en.wikipedia.org/wiki/Special:BookSources/1-893777-00-6) (series). [ISBN](/source/ISBN_(identifier)) [1-893777-01-4](https://en.wikipedia.org/wiki/Special:BookSources/1-893777-01-4) (volume).

1. **[^](#cite_ref-3)** Species *[Trimeresurus mcgregori](https://reptile-database.reptarium.cz/species.php?genus=Trimeresurus&species=mcgregori)* at [The Reptile Database](http://www.reptile-database.org/)

1. ^ [***a***](#cite_ref-Gum04_4-0) [***b***](#cite_ref-Gum04_4-1) [***c***](#cite_ref-Gum04_4-2) [***d***](#cite_ref-Gum04_4-3) [Gumprecht A](https://species.wikimedia.org/wiki/Andreas_Gumprecht), [Tillack F](https://species.wikimedia.org/wiki/Frank_Tillack), [Orlov NL](/source/Nikolai_Liutsianovich_Orlov), [Captain A](/source/Ashok_Captain), [Ryabov S](/source/Sergei_Aleksandrovich_Ryabov) (2004). *Asian Pitvipers*. First Edition. Berlin: GeitjeBooks. 368 pp. [ISBN](/source/ISBN_(identifier)) [3-937975-00-4](https://en.wikipedia.org/wiki/Special:BookSources/3-937975-00-4)

1. **[^](#cite_ref-ITIS_5-0)** ["*Trimeresurus flavomaculatus mcgregori*"](https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=635223). [Integrated Taxonomic Information System](/source/Integrated_Taxonomic_Information_System). Retrieved 12 August 2008.

1. **[^](#cite_ref-6)** [Beolens, Bo](/source/Bo_Beolens); [Watkins, Michael](/source/Michael_Watkins_(zoologist)); [Grayson, Michael](/source/Michael_Grayson) (2011). *The Eponym Dictionary of Reptiles*. Baltimore: Johns Hopkins University Press. xiii + 296 pp. [ISBN](/source/ISBN_(identifier)) [978-1-4214-0135-5](https://en.wikipedia.org/wiki/Special:BookSources/978-1-4214-0135-5). (*Trimeresurus mcgregori*, p. 173).

1. **[^](#cite_ref-7)** [Taylor](/source/Edward_Harrison_Taylor) (1919), p. 112.

1. **[^](#cite_ref-8)** Taylor (1919), p. 110.

Breeding female on eggs with hatchlings

## Further reading

- [Gumprecht A](https://species.wikimedia.org/wiki/Andreas_Gumprecht) (2002). "*Die Bambusottern der Gattung*Trimeresurus*[Lacépède](/source/Bernard_Germain_de_Lac%C3%A9p%C3%A8de) 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.

- [Taylor EH](/source/Edward_Harrison_Taylor) (1919). "New or rare Philippine reptiles". *Philippine Journal of Science* **14**: 105–125. (*Trimeresurus mcgregori*, new species, pp. 110–112.)

- [Weinell JL](/source/Jeffrey_L._Weinell), [Hooper E](https://species.wikimedia.org/wiki/Errol_Hooper), [Leviton AE](/source/Alan_Edward_Leviton), [Brown RM](https://species.wikimedia.org/wiki/Rafe_Marion_Brown) (2019). "Illustrated Key to the Snakes of the Philippines". *Proceedings of the California Academy of Sciences, Fourth Series* **66** (1): 1–49.

Taxon identifiers Trimeresurus mcgregori Wikidata: Q3539224 Wikispecies: Trimeresurus mcgregori CoL: 7CTMR GBIF: 2444204 iNaturalist: 73980 IRMNG: 11165589 ITIS: 1058523 IUCN: 169876 NCBI: 243556 Open Tree of Life: 841005 RD: mcgregori

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Adapted from the Wikipedia article [Trimeresurus mcgregori](https://en.wikipedia.org/wiki/Trimeresurus_mcgregori) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Trimeresurus_mcgregori?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.