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

Nerodia clarkii (from Cope 1889)
Nerodia clarkii (from Guyer & al. 2018)
Nerodia clarkii (from Cope 1900)
Nerodia clarkii (from Cope 1900)
Nerodia clarkii (from Cope 1900)
Nerodia cyclopion (from Illinois Natural History Survey)
Nerodia cyclopion (from Sanderson 1983)
Nerodia cyclopion (from Cope 1900)
Nerodia cyclopion (from Guyer & al. 2018)
Nerodia cyclopion (from Cope 1900)
Nerodia cyclopion (from Guyer & al. 2018)
Nerodia erythrogaster (from Conant 1969)
Nerodia erythrogaster (from Guyer & al. 2018)
Nerodia erythrogaster (from Hallowell 1842)
Nerodia erythrogaster (from Holbrook 1842)
Nerodia erythrogaster (from Cope 1900)
Nerodia erythrogaster (from Palmer & Braswell 1995)
Nerodia erythrogaster (from Cope 1900)
Nerodia erythrogaster (from Palmer & Braswell 1995)
Nerodia erythrogaster (from Cope 1900)
Nerodia fasciata (from Cope 1900)
Nerodia fasciata (from Gibbons & Dorcas 2004)
Nerodia fasciata (from Holbrook 1842)
Nerodia fasciata (from Morris 1987)
Nerodia fasciata (from Palmer & Braswell 1995)
Nerodia fasciata (from Powell & al. 2019)
Nerodia fasciata (from Guyer & al. 2018)
Nerodia fasciata (from Morris 1987)
Nerodia fasciata (from Guyer & al. 2018)
Nerodia floridana (from Sanderson 1983)
Nerodia rhombifer (from Cope 1900)
Nerodia rhombifer (from Guyer & al. 2018)
Nerodia rhombifer (from Illinois Natural History Survey)
Nerodia rhombifer (from Köhler 2001)
Nerodia rhombifer (from Lee 1996)
Nerodia rhombifer (from Pérez-Higareda & al. 2007)
Nerodia rhombifer (from Schmidt & Davis 1941)
Nerodia rhombifer (from Conant 1969)
Nerodia rhombifer (from Conant 1969)
Nerodia rhombifer (from Conant 1969)
Nerodia sipedon sipedon (from Palmer & Braswell 1995)
Nerodia sipedon williamengelsi (from Palmer & Braswell 1995)
Nerodia sipedon (from B. LeBold)
Nerodia sipedon (from Breckenridge 1944)
Nerodia sipedon (from Cope 1900)
Nerodia sipedon (from Davis & al. 2021)
Nerodia sipedon (from Gibbons & Dorcas 2004)
Nerodia sipedon (from Guyer & al. 2018)
Nerodia sipedon (from Holbrook 1842)
Nerodia sipedon (from Logier 1958)
Nerodia sipedon (from Stebbins 1954)
Nerodia sipedon (from Morris 1987)
Nerodia sipedon (from Morris 1987)
Nerodia sipedon (from Morris 1987)
Nerodia sipedon (from Morris 1987)
Nerodia sipedon (from Morris 1987)
Nerodia sipedon (from Morris 1987)
Nerodia taxispilota (from Guyer & al. 2018)
Nerodia taxispilota (from Holbrook 1842)
Nerodia taxispilota (from Palmer & Braswell 1995)
Nerodia taxispilota (from Powell & al. 2019)
Nerodia taxispilota (from Cope 1900)
Nerodia taxispilota (from Guyer & al. 2018)