Rainbow Boas and Neotropical Tree Boas (Reptile and Amphibian Keeper's Guide)

"Loosely defined, a rainbow boa is a small boa-adult at 3.5 to 7 feet (1.1-2.1 m) in length-of the genus Epicrates having a ground color of earthen tones, often with more richly colored circular dorsal and lateral markings over which play fleeting and variable highlights of rainbowlike hues."