Description
Corallus caninus is the largest of the tree boas, growing to lengths of up to 7ft. This species has a massive head relative to its body size, making them appear to be even larger than they are. That large head is attached to a relatively slender neck and a fairly robust if somewhat laterally compressed body. The tail is strongly prehensile, as it is in all Corallus.
The most striking characteristic of this species is its coloration. Most neonates are born either red or green but the existence of rare yellow neonates has also been documented. The young snakes then undergo a dramatic ontogenetic color change. Adult emerald tree boas can vary tremendously in color ranging from vibrant lime green to very dark, melanistic 
animals. The base color is accented with bold white alternating triangles along the dorsal surface. These markings get darker and more obscured on the first third of the body.
In addition to the more typical appearance there are two other phenotypes that are occasionally imported. the first is the patternless variety in which the there is a complete or near complete absence of the white dorsal markings. The second is the "anaconda phase", in this form the white markings are absent and are replaced by alternating round dark green blotches.
Habitat
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This is a species found almost exclusively in the lowland primary rainforest within its general range.
Distribution
This species was partitioned in 2009(Henderson, Passons and Feitosa 2009). The designation of Corallus caninus now applies only to the population found throughout the Guiana shield (north of the Rio Amazonas and east of the Rio Negro).
Projects
I am currently working with 1.1 c.b. animals.
