A
Species Profile

Amazon Tree Boa

Corallus hortulanus

Amazon's most color-shifting boa
Amazon Tree Boa/Shutterstock.com

Amazon Tree Boa Distribution

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Amazon Tree Boa

At a Glance

Wild Species
Also Known As Garden tree boa, Common tree boa, Variegated tree boa, Tree boa
Diet Carnivore
Activity Nocturnal+
Lifespan 12 years
Weight 1 lbs
Status Least Concern
Did You Know?

Extreme color polymorphism: individuals can be gray, brown, yellow, orange, red, or mottled-not "always green" (Henderson, *Tropical Tree Boas*, 1997/2002).

Scientific Classification

A slender, arboreal boa characterized by extreme color polymorphism (gray, brown, yellow, orange, red, and sometimes mottled patterns). Primarily nocturnal and adapted to life in trees.

Kingdom
Animalia
Phylum
Chordata
Class
Reptilia
Order
Squamata
Family
Boidae
Genus
Corallus
Species
Corallus hortulanus

Distinguishing Features

  • Highly variable coloration and patterning within the same species
  • Arboreal build with a prehensile tail used for climbing and anchoring
  • Typically a head and body shape suited for branch ambush, with prominent heat-sensing pits typical of boas
  • Often rests coiled on branches and hunts at night

Physical Measurements

Males and females differ in size

Length
459 ft 4 in (328 ft 1 in – 590 ft 7 in)
5 ft 3 in (4 ft 3 in – 6 ft 7 in)
Weight
1 lbs (1 lbs – 2 lbs)
2 lbs (1 lbs – 4 lbs)
Top Speed
1 mph
Estimated slow arboreal speed

Appearance

Primary Colors
Secondary Colors
Skin Type Smooth, glossy overlapping scales typical of boas; enlarged labial scales with heat-sensing pits used in nocturnal prey detection; nonvenomous (kills by constriction).
Distinctive Features
  • Slender, strongly arboreal boa with a clearly prehensile tail used for anchoring and climbing; commonly rests in characteristic 'S-shaped' ambush posture on branches at night (Henderson 1997, 2002).
  • Adult total length commonly ~1.2-1.8 m; large individuals can approach ~2.0 m (reported maximums vary by source/population; Henderson 1997, 2002).
  • Head relatively narrow compared with the robust, broad-headed Corallus caninus; overall build is lighter and more gracile, matching an arboreal lifestyle.
  • Amazon tree boa (Corallus hortulanus) shows extreme color variation — gray, brown, yellow, orange, red, cream, and mixes — so it is not always green; this notable variation is a key trait.
  • Primarily nocturnal and sit-and-wait predatory behavior; takes small mammals, birds, and lizards, striking from coils and constricting (Henderson 1997, 2002).
  • Centered on the Amazon Basin and northern South America (widely distributed in the Guiana Shield/Amazonian regions), matching habitats where arboreal cover supports branch-perching ambush behavior (Henderson 1997, 2002).
  • Longevity: commonly reported around ~15-20+ years in captivity; exact maxima depend on husbandry and documentation (species accounts summarized in Henderson 1997, 2002).

Sexual Dimorphism

Sexual size/shape dimorphism is present but not extreme: females tend to attain greater overall body size/mass, while males typically have proportionally longer tails and more prominent pelvic spurs (a common boa pattern; reported for Corallus in natural history accounts).

  • Proportionally longer tail (relative to total length) associated with hemipenes.
  • Pelvic spurs often more prominent/robust than in females (used during courtship).
  • On average larger and heavier-bodied adults than males (greater maximum size typical in boa females).
  • Pelvic spurs usually smaller/less prominent than males.

Did You Know?

Extreme color polymorphism: individuals can be gray, brown, yellow, orange, red, or mottled-not "always green" (Henderson, *Tropical Tree Boas*, 1997/2002).

Adult total length is commonly ~1.2-1.8 m, with large individuals reported to ~2.0 m (Henderson 1997/2002).

It's live-bearing (viviparous): litters reported from just a few young to >20 in some cases (Henderson 1997/2002).

A true canopy hunter: it often waits in an ambush posture on narrow branches, using its tail as a secure anchor point.

Diet is broad and opportunistic-documented prey includes birds, bats, lizards, and small mammals (Henderson 1997/2002 and field observations summarized therein).

Compared with the emerald tree boa (Corallus caninus), it's typically more slender and dramatically more variable in color; C. caninus is usually vivid green with bold white dorsal markings.

Captive longevity commonly reaches the mid-to-late teens, with some individuals reported exceeding ~20 years under good care (compiled husbandry records; see also general boa longevity summaries).

Unique Adaptations

  • Prehensile tail with strong grip: a key arboreal adaptation for anchoring on narrow, unstable perches while striking or climbing.
  • Heat-sensing labial pits (as in other boids): aids detection of warm-blooded prey in low light, complementing nocturnal hunting.
  • Laterally compressed body and strong ventral gripping scales: improves balance and traction on branches and vines.
  • Extreme color polymorphism: likely enhances camouflage across varied microhabitats (mossy limbs, dead leaves, lichen-covered branches, and sunlit foliage) within the Amazonian forest mosaic.
  • Large eyes and low-light visual emphasis: supports night hunting in complex vegetation.
  • Recurved, needle-like teeth: effective for snagging birds and mammals in arboreal settings, reducing the chance of prey escape.

Interesting Behaviors

  • Strictly (or strongly) nocturnal activity pattern: most foraging and movement occurs after dusk; by day it often rests coiled in vegetation (Henderson 1997/2002).
  • Sit-and-wait ambush: typically positions the anterior body in an 'S' curve along a branch, striking rapidly at passing prey.
  • Branch-edge hunting: frequently selects travel corridors such as branch intersections, vine tangles, and forest-edge vegetation where birds and bats pass close.
  • Ontogenetic diet tendency: smaller/younger snakes more often take lizards and small vertebrates, while larger adults expand to birds and mammals (pattern summarized for Corallus in Henderson 1997/2002).
  • Defensive repertoire: quick strikes, persistent gripping with recurved teeth, and strong tail anchoring-making it difficult to dislodge from branches.
  • Arboreal climbing and station-holding: uses the prehensile tail as a fifth "limb" to stabilize while probing for prey or repositioning in the canopy.

Cultural Significance

Amazon tree boa (Corallus hortulanus), called the garden tree boa, is often seen at night in gardens, orchards, and forest edges. People both fear and respect it; snakes often mean protection, danger, fertility, or the forest's hidden power.

Myths & Legends

Great Serpent (Brazilian Amazon folklore): a huge snake linked to deep waters and night travel; it makes waves, flips canoes, and punishes those who disrespect rivers, part of wider serpent tradition shaping views of snakes.

Mother of the Forest (western Amazon rainforest lore): a vast serpent said to dwell in the jungle, sometimes described as a guardian force of the woods that can enthrall or overwhelm travelers who wander carelessly.

Mother of the Waters (Peruvian Amazon traditions): a gigantic water-serpent spirit tied to whirlpools and dangerous river bends; offerings or respectful behavior are sometimes mentioned in oral accounts to avoid misfortune.

In Guianan and Amazonian forest myths, tree snakes like the Amazon tree boa (Corallus hortulanus) seen near homes or paths at night warn people to delay travel, avoid places, or take safety steps.

Conservation Status

LC Least Concern

Widespread and abundant in the wild.

Population Unknown

Protected Under

  • CITES: Corallus spp. are listed under Appendix II (international trade regulated via permits).
  • Occurs in multiple protected areas across its broad Amazonian/Guiana Shield distribution; site-level protection varies by country and reserve effectiveness.
  • HUBS (group-level context for Corallus/tree boas): Conservation statuses across the genus range from Least Concern for widespread mainland taxa (e.g., C. hortulanus, often also C. ruschenbergerii) to higher-risk categories for restricted-range endemics-especially some island (Lesser Antilles) and localized Chocó/Andean-foothill taxa (e.g., C. cookii, C. blombergi). Common cross-cutting threats include deforestation/fragmentation (agriculture, logging), localized persecution, and regulated/illegal collection for the pet trade; climate change is an emerging concern mainly via habitat drying/extreme events on small islands and forest-edge systems.

Life Cycle

Birth 10 neonates
Lifespan 12 years

Lifespan

In the Wild
8–15 years
In Captivity
12–20 years

Reproduction

Mating System Promiscuity
Social Structure Solitary
Breeding Pattern Transient
Fertilization Internal Fertilization
Birth Type Internal_fertilization

Behavior & Ecology

Social Solitary Group: 1
Activity Nocturnal, Crepuscular
Diet Carnivore Small mammals (rodents)

Temperament

Typically defensive when approached/handled; often responds with striking and repeated biting, a trait widely reported for Corallus hortulanus in field and captive contexts (Henderson 1997).
Ambush predator with a strong sit-and-wait strategy from arboreal perches; commonly uses an S-shaped strike posture and may remain motionless for extended periods between foraging attempts (Greene 1997).
Hub pattern (Corallus group-level): predominantly arboreal, perch-hunting, and nocturnal; variation among individuals/populations is notable in reactivity/defensiveness and perch choice, but stable sociality is not characteristic (Henderson 1997).
Adults are usually about 1.2–1.8 m long (sometimes to 2.0 m). In captivity they often live 15–20+ years and tend to stick to the same sites or structures like a territory.

Communication

Hissing Defensive warning; common in arboreal boas when threatened
Chemical communication via pheromones and scent trails Tongue-flicking/jacobson's organ) important in mate searching and reproductive condition assessment (general snake mechanism; applied to Corallus in Henderson 1997
Tactile communication during courtship/copulation Male alignment and cloacal contact); physical pushing/positioning can occur during mating interactions (Henderson 1997
Visual signaling through threat display/posture Neck/body inflation, coiling into a strike-ready S-curve) and orientation toward the stimulus; primarily used in defensive contexts rather than social bonding (Greene 1997
Substrate/branch vibration transmission during movement or defensive striking may function as a close-range deterrent cue to nearby animals, though not a specialized social signal.

Habitat

Biomes:
Tropical Rainforest Tropical Dry Forest Savanna Wetland Freshwater
Terrain:
Plains Hilly Riverine Coastal Island
Elevation: Up to 3280 ft 10 in

Ecological Role

Arboreal mesopredator (nocturnal ambush constrictor) in Amazonian forests

Helps regulate populations of small vertebrates (especially rodents and small birds) Links arboreal trophic levels by transferring energy from small mammals/birds/reptiles to higher predators (e.g., raptors and larger snakes that may prey on boas) Contributes to maintaining forest community balance through predation pressure on common small-vertebrate prey

Diet Details

Main Prey:
Small mammals Birds Lizards Frog

Human Interaction

Domestication Status

Wild

Corallus hortulanus (Amazon tree boa) is a wild boid, not domesticated. It has been kept and bred in captivity for decades because of its many color forms and manageable size, but there is no long-term breeding for tameness like true domestic animals. Human contact is mostly pet trade, research and education, occasional killing, and regulated international trade.

Danger Level

Low
  • Nonvenomous; primary risk is defensive biting-can be sudden and repeated, especially in wild-caught or poorly habituated individuals.
  • Bite injuries: punctures/lacerations and bleeding (long, recurved teeth adapted for gripping prey).
  • Secondary infection risk from oral bacteria if bites are not cleaned and monitored.
  • Allergic reaction risk (rare) to saliva or to bedding/feeder-related allergens in captive settings.

As a Pet

Not Suitable as Pet

Legality: Laws for the Amazon tree boa (Corallus hortulanus) vary by country, state, and city. Many places allow nonvenomous boas, but local exotic pet rules can restrict keeping. Cross-border trade may need import/export papers and CITES checks.

Care Level: Experienced

Purchase Cost: $150 - $2,000
Lifetime Cost: $3,000 - $8,000

Economic Value

Uses:
Exotic pet trade (captive-bred and, in some regions, wild-collected supply) Herpetological research and education (behavior, ecology, color polymorphism) Ecotourism/nature guiding value in parts of its Neotropical range
Products:
  • Live animals (pet market; locality/color forms)
  • Educational displays/teaching animals (zoos, outreach collections)

Relationships

Predators 5

Harpy eagle
Harpy eagle Harpia harpyja
Crested eagle Morphnus guianensis
Ornate hawk-eagle Spizaetus ornatus
Capuchin monkey
Capuchin monkey Sapajus
Tayra Eira barbara

Related Species 10

Emerald tree boa
Emerald tree boa Corallus caninus Shared Genus
Amazon basin emerald tree boa Corallus batesii Shared Genus
Annulated tree boa Corallus annulatus Shared Genus
Blomberg's tree boa Corallus blombergii Shared Genus
Cook's tree boa Corallus cookii Shared Genus
Grenada tree boa Corallus grenadensis Shared Genus
Panamanian tree boa Corallus ruschenbergerii Shared Genus
Common boa
Common boa Boa constrictor Shared Family
Green anaconda
Green anaconda Eunectes murinus Shared Family
Rainbow boa
Rainbow boa Epicrates cenchria Shared Family

Amazon tree boas are widely kept as pets, but surprisingly little is known about them in the wild.

This slender boa naturally comes in several colors, called phases. It’s a nonvenomous cousin to the emerald tree boa (Corallus caninus). Both are popular pets among experienced herpetoculturists and prized jewels of some zoo collections.

Incredible Amazon Tree Boa Facts

  • Amazon tree boas spend most of their lives in trees and only rarely come to the ground, but sometimes find a quiet corner on the ground to rest.
  • They are still very common in the wild but very difficult to find when you go looking for them.
  • These snakes have two genetically inherited phases, the garden phase and the colored phase.

Scientific Name and Classification of the Amazon Tree Boa

The Amazon tree boa is a member of the Boidae family of nonvenomous constrictors. Its scientific name is Corallus hortulana; although some sources list it as Corallus hortulanus. Corallus genus boas are native to Central America, South America, and the West Indies. Its specific name, hortulana, refers to the gardens where many residents can see these snakes.

This species goes by a few common names. In addition to the Amazon tree boa, it’s also called the garden boa, garden tree boa, boa Amazónica de jardín, boa arborícola Amazónica, boa de los jardines, boa arborícola del amazonas, and the macabrel.

Amazon Tree Boa Appearance

Amazon tree boas are long and thin, unlike some of their bulky boa cousins. These snakes range between five and six and a half feet in length and, even in nature, exhibit a wide variety of colors and patterns. Their base color can be black, brown, gray, red, orange, or yellow with speckles, bands, saddles, chevrons, or rhomboid shapes – or have no pattern at all. Color patterns are grouped into “phases,” the garden phase is drab with highly variable patterning, while the vivid reds, oranges, and yellows are another group called the color phase. Some of the color phase boas have patterns, and others do not.

Unlike the green tree python and emerald tree boa, Amazon tree boas don’t change colors as they mature. Aside from their patterns, which develop as they grow, they’re born with the color they’ll be as adults.

This species has large eyes with elliptical pupils that often match their body color. Amazon tree boas have excellent eyesight that they use during the day. Their heat-sensing pits are located along the upper and lower lip, and they use them at night to locate their prey. Their long, needle-like teeth and strong jaws make a bite painful, but they’re not venomous. So, the most you’ll have is a tooth left behind and possibly an infection if you don’t keep the area clean.

Amazon Tree Boa Behavior

This species lives the majority of its life in the trees, although they sometimes coil up in a safe hideout on the ground. The Amazon tree boa is solitary and can be active during the day and the night. However, they are more active at dusk and earlier in the night when the temperatures are a little cooler, and their prey is just getting moving.

Some keepers report that the individuals they have aren’t prone to biting. However, that isn’t the norm. These snakes are not shy about using their long, sharp teeth, even though they aren’t as long as those of the emerald tree boa (Corallus caninus) they’re still formidable. Amazon tree boas are known for their aggression, and it’s a rare snake that doesn’t lash out at a handler. When they strike, it is usually at the face.

However aggressive they are, it’s their adaptability that helps them adjust to captivity. This tendency to strike at everything is why most people try to keep these snakes in enclosures that are out of main traffic areas. Some keepers say that handling these snakes at night increases your odds of being bitten because they’re mostly nocturnal, so handling them during the day is better.

Many of the snakes in collections around the world are imported. More breeders are selling captive-bred individuals, but the vast majority are still wild-caught. The aggression and reactivity that this species exhibits may become lessened as more captive-bred individuals are introduced into the pet trade, but that’s unknown as yet. Regardless, this is not the snake for a beginner – try a ball python or a rosy boa; they’re much better choices.

Amazon Tree Boa

Amazon tree boas have several naturally-occurring colors – including red.

Amazon Tree Boa Habitat and Diet

Of all the Amazonian snakes, this snake has one of the most varied ecological niches. These snakes can be found in many areas of the Amazon, which include Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, Surinam, and Venezuela. Primarily arboreal, they’re found draped across tree branches in wild forests as well as fruit tree plantations. They are equally comfortable in someone’s garden trees as they are in wild, isolated forests. These snakes are highly adaptable and range from sea level upwards to 3,000 meters in altitude.

Its diet includes rats, mice, bats, lizards, frogs, and birds. Amazon tree boas use their prehensile tales to hang from branches while they wait for prey to come close enough. Watching them feed is interesting all by itself. They can grab their meal, coil around and constrict, and eat it all without ever leaving their perch.

Amazon Tree Boa Predators, Threats, Population, and Conservation

According to the IUCN assessment from 2013, there may be some localized threats such as habitat loss and persecution (it looks like a viper). However, there aren’t any widespread threats. They require trees in order to live, though, so complete deforestation would decimate them. Amazon tree boas are widespread and common throughout their range, but it’s also possible that over-harvesting for the pet trade may affect the species.

These snakes fall prey to other carnivores; birds of prey and other larger animals will eat them if given a chance.

Amazon Tree Boa Reproduction, Babies, and Lifespan

Amazon tree boas can live for over 15 years, and this species becomes sexually mature between the ages of two and five. Males are generally younger when they mature, as the females need to gain a little more size to be able to support the babies until they’re born.

Mating is usually between December and March. These snakes, like other boas, do not lay eggs. The female carries the babies for seven to ten months until they are ready to be born. Usually, a female gives birth to 4-10 neonates between September and November. After their first shed, the babies will take their first meal.

Next Up

Boas are part of a huge family of animals, all nonvenomous. Some can be dangerous to people and livestock, but most aren’t.

  • Rainbow boas are named for the rainbow iridescence that appears in the sunlight.
  • Green anacondas are the heaviest snakes in the world – and are in the Boidae family.
  • Cuban boas can reach 21 feet long, but most only reach 12-15 feet.
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Sources

  1. Corallus info / Accessed July 26, 2022
  2. Garden Tree Boa | IUCN Redlist of Threatened Species / Published October 25, 2013 / Accessed July 26, 2022
  3. West Indian Boas / Accessed July 26, 2022
  4. Corallus hortulana | Reptile Database / Accessed July 26, 2022
Gail Baker Nelson

About the Author

Gail Baker Nelson

Gail Baker Nelson is a writer at A-Z Animals where she focuses on reptiles and dogs. Gail has been writing for over a decade and uses her experience training her dogs and keeping toads, lizards, and snakes in her work. A resident of Texas, Gail loves working with her three dogs and caring for her cat, and pet ball python.
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Amazon Tree Boa FAQs (Frequently Asked Questions)

These snakes live in the Amazon, in the forests and fruit tree plantations of Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, Surinam, and Venezuela.