Da Cunha & Do Nascimento, 1983
Madre Selva field station, Depto Loreto, Peru. January 15, 2013.
We found several of these interesting little snakes crawling on forest trails at night. Adults lose the white head and nape, and can reach several feet in length, with a stout build. There are at least 140 species of Atractus, and more are being described all the time.
Peru 2013 Flickr album is here.
HerpMapper records for this species are here.