Reptilia · Squamata
Boa imperatorDaudin, 1803
Central American Boa Constrictor
Photograph by Sebastián de Jesús Herrera Buenfil, CC BY, via iNaturalist
A nocturnal, meat-eating snake from the Neotropic region, reaching 445 cm nose to tail.
Also called Pearl Island Boa.
Reptilia › Squamata › Boidae › Boa
- Grows to
- 4450mm
- greatest recorded
- Eats
- Carnivorous
- Active
- Nocturnal
- Lives up to
- 30years
Longer than 95% of all boas 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 109 to 6,700 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
31 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
- 2018
- Population trend
- Stable
The animal itself
- Limbs
- None
- Venomous
- No
- Fangs
- None
- Longest recorded life
- 30years
Zeas and Alvarado 2015
Size
- Length nose to tail · greatest recorded
- 4450mm14 ft 7 in
- Body mass · greatestcomputed
- 34,176g75 lb
snakes only in this source
computed from length by a family-level allometric equation, not weighed
How it lives
- Diet
- Carnivorous
- How it hunts
- Sit and wait
- Active
- Nocturnal
- Where it lives
- Arboreal, terrestrial
- Habitat
- Desert, Forest, Grassland, Savanna, Shrubland, Wetlands
- Biome
- Tropical & Subtropical Moist Broadleaf Forests
- Region
- Neotropic
- Mainland or island
- Mainland
- Highest it lives · above sea level
- 1580m
- Range size
- 1,698,078km²
mammals (Melgar-Martinez et al. 2023, also citing Hemies 2016 for "iguanas and other large lizards, birds, rats, opossums, agoutis, coatis, ocelots, and young deer")
Sit (Leenders 2019)
Leenders 2019
Arboreal&Terrestrial (Leenders 2019)
NSL-1575 (Leenders 2019)
Breeding
- Reproduction
- Viviparous
- Sex decided by
- Genes, XX/XY
- Eggs or young per clutch
- 10–65eggs
- Mean clutch
- 25eggs
Ray 2017
10-65 mean=25 (Ray 2017), up to 60 (Leenders 2019), 10-64 (Zeas and Alvarado 2015)
Naming and history
- Suborder
- Serpentes
- Infraorder
- Alethinophidia
- Subspecies
- Boa imperator imperator DAUDIN 1803 Boa imperator sabogae (BARBOUR 1906)
- Described by
- Daudin
- Moved to another genus · since it was first described
- No
- Described in
- 1803
- Type locality
- Mexico
Keeping one
14 ft 7 in × 7 ft 4 in × 21 ft 11 in(445 × 223 × 668 cm)
Minimum length × width × height, for one animal. Bigger is always better.
The standard sizes snakes as a fraction of total length: 1 × 0.5 × 1.5.
Recorded both on the ground and climbing, so this is the larger of the two rules in every dimension.
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 14 ft 7 in (4450 mm), at 1 × 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 Central American Boa Constrictor. 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.
2102kJ per day
Worked out for an animal of 34,176 g, the heaviest recorded for Central American Boa Constrictor — 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 · greatest recorded
- — 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
- — 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
- — 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
- — Average clutch
- — 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
- — 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
- — Red List criteria
- — Active season · shortest recorded
- — Active season · longest recorded
- — Density · lowest recorded
- — Density · highest recorded
- — Home range · largest recorded
- — Active in
- — Lowest it lives · above sea level
Others in Boidae
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). Boa imperator. Retrieved 2026-09-08, from https://www.allanglescreatures.com/species/boa-imperator
@misc{boa_imperator_2026,
title = {Boa imperator},
author = {{The Reptile & Amphibian Encyclopedia}},
year = {2026},
url = {https://www.allanglescreatures.com/species/boa-imperator}
}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.
- Oskyrko, O. et al. (2024). ReptTraits: a comprehensive dataset of ecological traits in reptiles. Scientific Data. Used under CC BY 4.0.