Reptilia · Squamata
Elaphe anomalaBoulenger, 1916
Korean Ratsnake
Photograph by Theo Busschau, CC BY, via iNaturalist
A tree-dwelling, day-active, meat-eating snake from the Palearctic region, reaching 220 cm nose to tail.
Reptilia › Squamata › Colubridae › Elaphe
- Grows to
- 2200mm
- greatest recorded
- Eats
- Carnivorous
- Active
- Diurnal
- Lives up to
- 20years
Longer than 97% of all colubrid snakes 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 98 to 3,800 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
40 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
- Conservation status
- Least Concern
- Status assessed · the year the Red List last looked
- 2019
- Population trend
- Decreasing
The animal itself
- Limbs
- None
- Colour on the back
- Brown
- Pupil
- Round
- Venomous
- No
- Fangs
- At the back of the mouth
- Longest recorded life
- 20years
15-20 in captivity (Messenger 2021)
Size
- Length snout to vent · greatest recorded
- 1925mm6 ft 4 in
- Length nose to tail · greatest recorded
- 2200mm7 ft 3 in
- Hatchling length · nose to tail
- 365mm14.5 in
- Body mass · greatestcomputed
- 985.3g2.2 lb
- Body mass at hatching
- 20.8g0.73 oz
Chen et al. 2019 (2135, listed as SVL, I suspect it may be total length), Messenger 2021 (max 2070 in males, 2200 in females, hatchlings 280-450, maturity 1100 - all total lengths), Jablonski et al. 2023b (max 1925 mm SVL citing Qi et al. 2021)
snakes only in this source
computed from length by a family-level allometric equation, not weighed
How it lives
- Diet
- Carnivorous
- How it hunts
- Active foraging
- Active
- Diurnal
- Where it lives
- Arboreal
- Habitat
- Grassland, Rocky, Shrubland
- Biome
- Temperate Broadleaf & Mixed Forests
- Active season · months of the year
- 9months
- Region
- Palearctic
- Mainland or island
- Mainland
- Elevation · above sea level
- 100–1800m
- Range size
- 1,485,486km²
rodents, birds and bird eggs, juveniles prey on lizards (Messenger 2021)
Wang et al. 2023
Messenger 2021
"highly arboreal" (Messenger 2021)
low altitude to 1800 (Messenger 2021), so I list 100-1800
Breeding
- Reproduction
- Oviparous
- Average clutch
- 12eggs
- Eggs or young per clutch
- 8–15eggs
- Clutches a year
- 1per year
- Egg length
- 63mm2.5 in
- Egg width
- 31mm1.25 in
- First breeds at
- 36–48months
Feldman et al. 2015
8-15 (Messenger 2021)
Naming and history
- Suborder
- Serpentes
- Infraorder
- Alethinophidia
- Subspecies
- No
- Described by
- Boulenger
- Moved to another genus · since it was first described
- Yes
- Described in
- 1916
- Type locality
- China
Keeping one
5 ft 5 in × 3 ft 7 in × 10 ft 10 in(165 × 110 × 330 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 7 ft 3 in (2200 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 Korean Ratsnake. 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.
90kJ per day
Worked out for an animal of 985 g, the heaviest recorded for Korean Ratsnake — 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 female mean
- — Length snout to vent · adult male mean
- — Length snout to vent · adult mean
- — Female length · mean, nose to tail
- — 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
- — Largest juvenile · snout to vent
- — Largest juvenile · shell length
- — Body mass · a typical adult
- — Body mass · adult female, mean
- — Preferred body temperature · chosen in a laboratory gradient
- — Body temperature when active · measured in the wild
- — Eats arthropods
- — Eats vertebrates
- — Eats plant matter
- — How the young develop
- — Gestation or incubation
- — Mean clutch · smallest reported
- — Mean clutch · largest reported
- — Clutches in a year
- — 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
- — Body temp in the wild · lowest mean recorded
- — Body temp in the wild · highest mean recorded
- — Pattern on the back
- — Sex decided by
- — Red List criteria
- — Density · lowest recorded
- — Density · highest recorded
- — Home range · largest recorded
- — Active in
Others in Colubridae
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). Elaphe anomala. Retrieved 2026-09-08, from https://www.allanglescreatures.com/species/elaphe-anomala
@misc{elaphe_anomala_2026,
title = {Elaphe anomala},
author = {{The Reptile & Amphibian Encyclopedia}},
year = {2026},
url = {https://www.allanglescreatures.com/species/elaphe-anomala}
}Sources
- Meiri, S. (2024). SquamBase — a database of squamate (Reptilia: Squamata) traits. Global Ecology and Biogeography. Public domain (CC0).
- Oskyrko, O. et al. (2024). ReptTraits: a comprehensive dataset of ecological traits in reptiles. Scientific Data. Used under CC BY 4.0.
- Catalogue of Life (dataset 3LR), used under CC BY.