Epicrates maurus is a species of non-venomous constrictor in the family Boidae, commonly found in the Amazon region of South America. The common name for this species is the brown rainbow boa. This species is semi-arboreal, spending time both on the ground and climbing trees and shrubs, although they are also known to swim. They are nocturnal and primarily active in the middle of the night. Rainbow boas are known for their attractive iridescent sheen on their scales in the sunlight.

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