Tree boas on Grenada exhibit a wide variety of colors and pattern variants. The dorsal ground color may be pale grayish white, gray to almost black, yellow, orange-red, or brown. On the Grenadines, color and pattern on individual islands appear stable. Islands lying closer to St. Corallus enydris on Trinidad and Tobago, lying just off the coast of Venezuela, are invariable uniformly colored pale brown to mustard yellow.
Mustard yellow is a common color variant on Grenada.
It is not unlikely that tree boas occurring along the mouth of the Orinoco were swept with the currents outward and westward on rafts of debris and ultimately landed at and colonized Grenada. Most color diversity occurs in lower, warmer, drier, areas. The dark pattern is present in the Pearls area, but pale gray, yellows and reds predominate. A female C. enydris may produce offspring that are all colored and pattered as she is, or may produce a variety of color variants in a single litter, only a fraction looking like the mother. Because Corallus enydris has a proclivity for rodents and for fruit orchards, and because they occur at relatively high densities in orchards, I believe that they may be of significant economic importance.