Reptilia · Squamata
Trimeresurus uetziVogel, Nguyen, David, 2023
Uetz’ pit viper
Photograph by Ashwin Viswanathan, CC BY, via iNaturalist
A tree-dwelling, nocturnal, meat-eating snake from the Oriental region, reaching 811 mm nose to tail.
Reptilia › Squamata › Viperidae › Trimeresurus
- Grows to
- 811mm
- greatest recorded
- Eats
- Carnivorous
- Active
- Nocturnal
- Lives
- Arboreal
Longer than only 46% of all vipers anyone has measured.
The bar is the rank itself: its length is the share of the family this animal exceeds. The chart below is the family’s real spread, on a logarithmic scale because body length here runs from 280 to 3,900 mm. The solid rule is this animal. Every bar is a count of real species, and nothing on this figure is estimated.
What is known
19 sourced facts, each taken from a named scientific dataset. How to read these.
Cited from a dataset unless a row is marked otherwise.
Standing in the world
- Still living
- Extant
The animal itself
- Limbs
- None
Size
- Length snout to vent · greatest recorded
- 689mm2 ft 3 in
- Length snout to vent · adult female mean
- 492mm19.5 in
- Length nose to tail · greatest recorded
- 811mm2 ft 8 in
- Female length · mean, nose to tail
- 574mm22.5 in
- Body mass · greatestcomputed
- 434.6g15.3 oz
Vogel et al. 2023 (SVL 13 females 316-689, mean 492, 10 males 312-472, mean 396; total length 10 females 369-811, mean 574, 9 males 396-591, mean 491)
snakes only in this source
computed from length by a family-level allometric equation, not weighed
How it lives
- Dietcomputed
- Carnivorous
- Active
- Nocturnal
- Where it lives
- Arboreal
- Region
- Oriental
- Mainland or island
- Mainland
- Elevation · above sea level
- 60–1060m
no actual data but can be imputed as carnivorous like all snakes
"collected both during the day and at night" (Vogel et al. 2023)
perched on trees or shrubs, branches or on the ground under bamboo clump" (Vogel et al. 2023)
200-3514 ft (Voget et al. 2023)
Naming and history
- Suborder
- Serpentes
- Infraorder
- Alethinophidia
- Described by
- Vogel, Nguyen, David
- Moved to another genus · since it was first described
- No
- Described in
- 2023
- Type locality
- Burma
Keeping one
24 in × 16 in × 4 ft(61 × 41 × 122 cm)
Minimum length × width × height, for one animal. Bigger is always better.
The standard sizes snakes as a fraction of total length: 0.75 × 0.5 × 1.5.
Lives in vegetation, so height and climbing structure matter more than floor space.
Mindestanforderungen an die Haltung von Reptilien (Sachverständigengutachten), German Federal Ministry for Nutrition, Agriculture and Forestry, Animal Welfare Division, 10 January 1997. The standard states these floor areas are recommendations rather than binding limits.
From this animal’s own total length of 2 ft 8 in (811 mm), at 0.75 × 0.5 × 1.5 times it, following the German federal welfare standard — how this is worked out.
No preferred body temperature has been recorded for Uetz’ pit viper. Rather than repeat a number from a care sheet, this page leaves it out.
Feeding
A prey item should be between the same width as the widest part of the snake's body and about 1.5 times that width.
Widely used across snake husbandry references. An alternative formulation gives prey at 10-15% of the snake's body mass. This is established practice, not a measurement.
43kJ per day
Worked out for an animal of 435 g, the heaviest recorded for Uetz’ pit viper — so it is the top of the range, not a figure for a particular animal. Weigh yours and the number will be lower.
An upper estimate, not a feeding target, and not veterinary advice. The equation covers only what an animal burns staying alive, so a growing, gravid or recovering animal needs more — and it was measured on wild animals, which move far more than one in an enclosure. Body condition and a vet who knows the species are what a feeding decision should rest on. Where this comes from.
What nobody knows
These are not gaps in our research. No scientific dataset records them for this species — and saying so is information you cannot get from a reference that simply leaves a field out.
- — Length snout to vent · adult male mean
- — Length snout to vent · adult mean
- — Length nose to tail · adult male mean
- — Length nose to tail · adult mean
- — Largest female · snout to vent
- — Largest male · snout to vent
- — Largest female · shell length
- — Largest male · shell length
- — Hatchling length · snout to vent
- — Hatchling length · nose to tail
- — Largest juvenile · snout to vent
- — Largest juvenile · shell length
- — Egg length
- — Egg width
- — Body mass · a typical adult
- — Body mass · adult female, mean
- — Body mass at hatching
- — Longest recorded life
- — Preferred body temperature · chosen in a laboratory gradient
- — Body temperature when active · measured in the wild
- — Eats arthropods
- — Eats vertebrates
- — Eats plant matter
- — How it hunts
- — Reproduction
- — How the young develop
- — Gestation or incubation
- — Average clutch
- — Smallest clutch recorded
- — Largest clutch recorded
- — Mean clutch · smallest reported
- — Mean clutch · largest reported
- — Clutches in a year
- — Clutches a year · fewest
- — Clutches a year · most
- — First breeds from · youngest recorded
- — First breeds by · oldest recorded
- — Hatchling length · smallest recorded
- — Hatchling length · largest recorded
- — Age at first breeding · female
- — Mature from · youngest recorded
- — Mature by · oldest recorded
- — Size at maturity · smallest recorded
- — Size at maturity · largest recorded
- — Venomous
- — Fangs
- — Body temp in the wild · lowest mean recorded
- — Body temp in the wild · highest mean recorded
- — Colour on the back
- — Pattern on the back
- — Pupil
- — Sex decided by
- — Conservation status
- — Status assessed · the year the Red List last looked
- — Population trend
- — Red List criteria
- — Biome
- — Active season · shortest recorded
- — Active season · longest recorded
- — Density · lowest recorded
- — Density · highest recorded
- — Home range · largest recorded
- — Subspecies
- — Habitat
- — Active in
- — Range size
Others in Viperidae
Take this data
Everything on this page is available as data under CC BY 4.0 — use it freely, credit it, no permission needed.
This species as JSON · the whole dataset
Cite this page
The Reptile & Amphibian Encyclopedia (2026). Trimeresurus uetzi. Retrieved 2026-09-08, from https://www.allanglescreatures.com/species/trimeresurus-uetzi
@misc{trimeresurus_uetzi_2026,
title = {Trimeresurus uetzi},
author = {{The Reptile & Amphibian Encyclopedia}},
year = {2026},
url = {https://www.allanglescreatures.com/species/trimeresurus-uetzi}
}Sources
- Meiri, S. (2024). SquamBase — a database of squamate (Reptilia: Squamata) traits. Global Ecology and Biogeography. Public domain (CC0).
- Catalogue of Life (dataset 3LR), used under CC BY.