Head drawings: genus Hydrodynastes(Serpentes: Colubridae) - compiled by Van Wallach Home

Hydrodynastes bicinctus (from Chippaux 1986)
Hydrodynastes bicinctus (from Lancini & Kornacker 1989)
Hydrodynastes bicinctus (from PĂ©rez-Santos & Moreno 1988)
Hydrodynastes bicinctus (from Murta-Fonseca & al. 2015)
Hydrodynastes bicinctus (from Murta-Fonseca & al. 2015)
Hydrodynastes bicinctus (from Roze 1966)
Hydrodynastes bicinctus (from Roze 1966)
Hydrodynastes gigas (from Amaral 1976)
Hydrodynastes gigas (from Chippaux 1986)
Hydrodynastes gigas (from Pereira-Filho & al. 2017)
Hydrodynastes gigas (from Schocchi & al. 2006)
Hydrodynastes gigas (from Cei 1993)