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

Coluber constrictor (from Auffenberg 1955)
Coluber constrictor (from Davis & al. 2021)
Coluber constrictor (from Holbrook 1842)
Coluber constrictor (from Lee 1996)
Coluber constrictor (from Powell & al. 2019)
Coluber constrictor (from Stafford & Meyer 2000)
Coluber constrictor (from Stebbins 1954)
Coluber constrictor (from Woodbury 1931)
Coluber constrictor (from Zeiner & al. 1988)
Coluber constrictor (from Cope 1900)
Coluber constrictor (from Cope 1900)
Coluber constrictor (from Cope 1900)
Coluber constrictor (from Palmer & Braswell 1995)
Coluber constrictor (from Palmer & Braswell 1995)