Corallus annulatus grows to a length of around 5-6ft. The body is slightly laterally compressed with a medium build. Like all members of the genus Corallus, this species has a strong prehensile tail.
There are two distinct color phases seen in this species. The most common appearance is the gray/brown phase in which individuals have a light gray to brown background color overlaid with dark rhomboidal rings along the flanks. The red/orange phase is less common and individuals of this phase range from burnt orange to red with darker brown rings on the sides.
Annulated tree boas have an almost unequaled ability to change color. While this ability is seen in many boids to some degree, this species is capable of extreme changes in its pigmentation. This ability is most pronounced in the gray/brown phase with individuals changing from very dark brown to a shade of pale gray in a short period of time. The orange phase also has this ability with specimens changing from red/brown to pale orange or even pink.
Another characteristic of this species is its temperament. While most Corallus are typically aggressive, annulated tree boas as a rule are shy, docile creatures.
This is primarily a denizen of the rainforest areas within its distribution. In addition to rainforest, specimens have also been encountered secondary growth and occasionally in human modified habitat. Annulated tree boas are highly arboreal and are most often found above the forest floor though they are occasional encountered on the ground. During the day these boas prefer the security of dense vegetation or tree hollows, emerging at nightfall to forage for prey.
I am currently working with 1.1 c.b. adults of this very rare species. The pair consists of an orange phase male and a gray/brown female.