Attributes / relations provided by
♦ ¹Anurans as prey: an exploratory analysis and size relationships between predators and their prey, L. F. Toledo, R. S. Ribeiro & C. F. B. Haddad, Journal of Zoology 271 (2007) 170–177
♦ ²Natural History of the South American Water Snake Helicops leopardinus (Colubridae: Hydropsini) in the Pantanal, Central Brazil, Robson W. Ávila, Vanda L. Ferreira and Janaína A. O. Arruda, Journal of Herpetology, Vol. 40, No. 2, pp. 274–279, 2006