Leptophis nigromarginatus, commonly known as the black-skinned parrot snake, is a snake of the family Colubridae.
It is found in the Amazon rainforest in Ecuador.
L. nigromarginatus is a bright green, slender, medium-sized, snake. Adults are typically in total length. Black edges around the outer margin of each scale form a distinctive net-like pattern on the dorsal surface of the animal. The ventral surface has a metallic sheen, and may be green or rust-colored.
It is arboreal, living in dense brushy vegetation. It is found in secondary and primary forest.
Active during the daytime, it sleeps in vegetation at night.
It feeds on lizards, frogs, and small birds.