rainbow boa Rainbow Boa. Rainbow Boas as Pets. Rainbow boa, biology, behavior, husbandry, daily care, enclosures, costs, diet, interaction and health. Named for the rainbow-like sheen cast by their scales, rainbow boas (Epicrates spp.) are among the most beautiful snakes in the world. In fact, because they are aesthetically appealing, possess calm personalities and remain smaller than many gigantic constrictors,...