{{Short description|Species of snake}} {{Speciesbox | image = Trimeresurus macrops, Large-eyed pit viper.jpg | image_caption = ''Trimeresurus macrops'' - Khao Yai National Park, Thailand | status = LC | status_system = IUCN3.1 | status_ref = <ref name="iucn status 20 November 2021">{{cite iucn |author=Stuart, B. |author2=Chan-Ard, T. |author3=Thy, N. |date=2012 |title=''Trimeresurus macrops'' |volume=2012 |article-number=e.T192009A2027444 |doi=10.2305/IUCN.UK.2012-1.RLTS.T192009A2027444.en |access-date=20 November 2021}}</ref> | genus = Trimeresurus | species = macrops | authority = Kramer, 1977 | synonyms = * ''Trimeresurus macrops'' <small>Kramer, 1977</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> * ''Cryptelytrops macrops'' <br /><small>&ndash; Malhotra & Thorpe, 2004</small> * ''Trimeresurus (Trimeresurus) macrops'' <small>&ndash; David et al., 2011</small><ref name="RDB">The Reptile Database. www.reptile-database.org.</ref> }}

'''''Trimeresurus macrops''''' is a [[venomous snake|venomous]] [[Crotalinae|pit viper]] [[species]] [[Endemism|endemic]] to [[Southeast Asia]]. No [[subspecies]] are currently recognized.<ref name="ITIS">{{ITIS |id=634922 |taxon=''Trimeresurus macrops'' |accessdate=28 July 2008}}</ref> Common names include '''large-eyed pitviper''',<ref name="Gum04">Gumprecht A, Tillack F, [[Nikolai Liutsianovich Orlov|Orlov NL]], [[Ashok Captain|Captain A]], Ryabov S. 2004. ''Asian Pitvipers''. Geitje Books. Berlin. 1st Edition. 368 pp. {{ISBN|3-937975-00-4}}.</ref> '''green pit viper''', and '''Kramer's pit viper'''.<ref>{{Cite web |title=Kramer's Pit Viper (Trimeresurus macrops) |url=https://www.inaturalist.org/taxa/146510-Trimeresurus-macrops |access-date=2024-09-27 |website=iNaturalist |language=en}}</ref>

==Description== It can be distinguished from other green pit vipers by the relatively large size of its eyes, which is especially noticeable in adult specimens, and to which the [[Specific name (zoology)|specific name]], ''macrops'', refers.<ref name="RDB"/>

==Breeding== According to Strine, Green pit vipers mate during the end of the rainy season, between September and October.<ref>{{cite journal |last1=Barnes |first1=C.H. |last2=Farren |first2=W. |last3=Strine |first3=C.T. |last4=Suwanwaree |first4=P. |title=ocial Behavior Displayed by the Green Pit Viper Trimeresurus (Cryptelytrops) macrops |journal=Tropical Natural History |date=March 2020 |volume=20 |issue=1 |pages=95–103|doi=10.58837/tnh.20.1.178323 |doi-access=free }}</ref> Female vipers will pull male vipers up the tree and begin mating.

==Geographic range== It is found in [[Southeast Asia]] in northern [[Cambodia]], [[Laos]], [[Thailand]], and southern [[Vietnam]].<ref name="RDB"/> The [[Type locality (biology)|type locality]] given is "[[Bangkok]], Thailand".<ref name="McD99"/>

== Venom == ''T. macrops'' belongs to the genus ''[[Trimeresurus]]'', a group of Asian vipers with primarily [[Hemotoxin|hemotoxic]] venom — a type of venom that can destroy blood cells, disrupt blood clotting, and damage organ function. A bite from this viper's better-studied cousin, the [[Trimeresurus albolabris|white-lipped pit viper]], is said to cause effects ranging from mild envenomation to death.<ref>{{Cite web |last=Parks |first=Creative Commons Attribution-ShareAlike 4 0 International Thai National |title=Trimeresurus albolabris, White-lipped pit viper |url=https://www.thainationalparks.com/species/trimeresurus-albolabris |access-date=2024-09-27 |website=Thai National Parks |language=en}}</ref> The broader viper family, [[Viper|Viperidae]], includes some of the deadliest snakes in the world, responsible for more human fatalities than any other type of snake.

==References== {{Reflist}}

==Further reading== * Kramer, Eugen. 1977. ''Zur Schlangenfauna Nepals''. [[Revue suisse de Zoologie]] '''84''' (3): 721–761.

==External links== * {{NRDB species|genus=Trimeresurus|species=macrops|date=2 December|year=2012}}

{{Taxonbar|from=Q3061813}}

[[Category:Trimeresurus|macrops]] [[Category:Reptiles described in 1977]]

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