Microsoft Store
 

Viper


 

AdenorhinosAtherisAzemiopsBitisCerastesDaboiaEchisEristicophisMacroviperaMontatherisProatherisPseudocerastesVipera

References

  • Mehrtens, John M. Living Snakes of the World in Color. New York: Sterling Publishing, 1987. ISBN 080696460X.