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Emerald Tree Boa: Characteristics, Diet, Facts & More [Fact Sheet]

The Emerald Tree Boa, a striking symbol of the South American rainforests, is as captivating as it is elusive. Known for its vibrant green color and unique arboreal lifestyle, this snake is a marvel of the animal kingdom. In this article, we dive into the world of the Emerald Tree Boa, exploring its characteristics, habitat, behavior, and more.

This species, often mistaken for its Asian counterpart, the Green Tree Python, is a fascinating subject for herpetologists and snake enthusiasts alike. Its distinct lifestyle and adaptation to the rainforest canopy make it a remarkable example of nature’s ingenuity.

The Emerald Tree Boa at a Glance


Class:Reptilia (Reptiles)
Species:C. caninus

Essential Information

Average Size:Length: 5-6 feet (1.5-1.8 meters)
Average Weight:2-3 pounds (0.9-1.4 kilograms)
Average Lifespan:15-20 years in captivity
Geographical Range:Northern South America
Conservation Status:Least Concern (IUCN Red List)

Species and Subspecies

The Emerald Tree Boa is represented by a single species, Corallus caninus, with no recognized subspecies. However, there is a closely related species within the same genus, Corallus batesii, often called the Amazon Basin Emerald Tree Boa. While similar in appearance, there are subtle differences between the two:

  1. Corallus caninus (Emerald Tree Boa): Predominantly found in the Guiana Shield region, it is characterized by a more vibrant green color and typically has fewer, larger white scales or markings on its back.
  2. Corallus batesii (Amazon Basin Emerald Tree Boa): This species, residing primarily in the Amazon Basin, usually displays a lighter green color and has more frequent, smaller white markings.

The distinction between these two species is primarily of interest to herpetologists and serious reptile enthusiasts. For most casual observers, the striking green color and arboreal nature of these snakes are the most captivating and distinctive characteristics.

Emerald Tree Boa


Emerald Tree Boas are most notable for their brilliant green color, which provides excellent camouflage among the foliage of their rainforest habitat. This vibrant coloration is interspersed with white or yellowish irregular zigzag patterns or spots, which vary between individuals. They possess a prehensile tail, allowing them to grasp and wrap around branches securely.

Adult Emerald Tree Boas typically reach a length of 5 to 6 feet (1.5 to 1.8 meters), with their slender, muscular bodies adapted for an arboreal lifestyle. They have distinctively large front teeth, longer than any other non-venomous snake, which are effective for hunting and capturing prey.

Sexual dimorphism in this species is minimal, although females tend to be slightly larger and heavier than males. This size difference is primarily related to the females’ role in gestating and giving birth to offspring.

Habitat and Distribution

The Emerald Tree Boa is native to the rainforests of northern South America, with its range encompassing parts of Brazil, Venezuela, Colombia, and the Guianas. They are strictly arboreal, spending the majority of their lives in trees.

Their preferred habitat includes tropical rainforests, riverine woodlands, and forested swamps, where humidity and temperature conditions are ideal for their survival.

These environments provide ample tree cover and a rich diversity of potential prey. The dense canopy also offers protection from potential predators and supports their stealthy hunting strategy.

Emerald Tree Boa


Emerald Tree Boas are primarily nocturnal, becoming active at night to hunt and explore. During the day, they often rest coiled on branches, blending into the foliage. Their behavior is characterized by a sit-and-wait hunting strategy. They remain motionless, waiting for unsuspecting prey to come within striking distance.

They are solitary animals, coming together only for mating purposes. Social interaction outside of breeding is rare, and they are typically territorial.

Communication in Emerald Tree Boas is not well understood but likely involves chemical cues, as is common in many snake species. Their senses of sight and smell are well-developed, aiding in the detection of prey and potential mates.

Despite their impressive appearance and predatory nature, they are generally not aggressive towards humans unless provoked or threatened.

Diet and Feeding Behavior

Emerald Tree Boas are carnivorous, with a diet primarily consisting of small mammals and occasionally birds. Common prey includes rodents, bats, and small arboreal mammals that share their forest habitat. Their hunting strategy is based on ambush, where they use their excellent camouflage and patience to capture unsuspecting prey.

These boas utilize their heat-sensing pits located on their jawline to detect the body heat of their prey, an adaptation particularly useful during their nocturnal hunts. Once they detect a potential meal, they strike quickly, using their long teeth to grab the prey and then constrict it.

In captivity, their diet can be maintained with a regular supply of rodents, matching the size of the prey to the size of the snake to prevent injury or health issues.


In the wild, young and smaller Emerald Tree Boas can fall prey to birds of prey, larger snakes, and some mammals. Their bright green coloration, while excellent for blending into the foliage, can make juveniles vulnerable if they stray into less densely vegetated areas.

Adults have fewer natural predators due to their size, arboreal nature, and cryptic coloration. Their primary defense against predators is their ability to remain motionless and undetected in the tree canopy.

Emerald Tree Boa

Reproduction and Life Cycle

Emerald Tree Boas are ovoviviparous, meaning they give birth to live young after carrying eggs internally. Mating typically occurs during the rainy season, and during this time, males may engage in combat for the right to mate with a receptive female.

The gestation period for Emerald Tree Boas is quite lengthy, lasting approximately 6 to 7 months. Females give birth to a litter of live young, typically ranging from 5 to 15 offspring. The neonates are born with a reddish-brown coloration, which gradually changes to the characteristic green as they mature. This color change usually occurs within the first year of their life.

Newborns are independent from birth, and capable of climbing and hunting on their own. They reach sexual maturity in 3 to 4 years. In the wild, their lifespan can be shortened by predation and environmental factors, but in captivity, they can live up to 15 to 20 years with proper care.

Conservation and Threats

The Emerald Tree Boa is currently listed as Least Concern by the IUCN. However, like many species inhabiting the rainforests of South America, it is potentially at risk due to habitat loss and deforestation. The exact impact of these environmental changes on their population is not well-documented but is a growing concern among conservationists.

There are no specific conservation programs exclusively for the Emerald Tree Boa, but efforts to preserve the Amazon rainforest and its immense biodiversity indirectly benefit this species. Maintaining the health of these ecosystems is crucial for the survival of countless species, including the Emerald Tree Boa.

Fun Facts

  1. Color-Changing Juveniles: Baby Emerald Tree Boas are not born green; they start life with a reddish-brown color and gradually transition to green as they mature.
  2. Long Teeth: They have some of the longest teeth relative to body size of any non-venomous snake, an adaptation for capturing birds and mammals in the canopy.
  3. Thermoreception: Emerald Tree Boas have specialized pits near their mouth that detect heat, allowing them to sense warm-blooded prey in total darkness.
  4. Arboreal Acrobats: These snakes spend most of their lives in trees, rarely descending to the ground, showcasing remarkable adaptations for an arboreal lifestyle.
  5. Lengthy Gestation: Emerald Tree Boas have one of the longer gestation periods among snakes, carrying their young for about 6 to 7 months.

Frequently Asked Questions

How large do Emerald Tree Boas get?

Adult Emerald Tree Boas typically reach a length of 5 to 6 feet (1.5 to 1.8 meters).

What do Emerald Tree Boas eat?

They primarily feed on small mammals and birds, using their long teeth and constriction to capture and subdue prey.

Are Emerald Tree Boas venomous?

No, they are non-venomous but use constriction to immobilize their prey.

How do Emerald Tree Boas reproduce?

They are ovoviviparous, giving birth to live young after a gestation period of about 6 to 7 months.

Can Emerald Tree Boas change color?

Juveniles change color as they mature, starting from a reddish-brown to their characteristic green as adults.

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