As fotos foram feitas na Floresta Estadual do Antimary, junto a uma equipe de pesquisadores do Butantan. Todos os bichos foram coletados e depositados na coleção.
Family Colubridae or Dipsadidae
This isn't the best pic for an id, but it matches up pretty well with Fraga et al. and with my other photos at www.flickr.com/photos/stoufferlsu/5526212131 and
www.inaturalist.org/observations/7640439
https://www.flickr.com/photos/stoufferlsu/5526262175