The main species of lizards and snakes caught by humans in the stream cave. From top left clockwise: Woodland viper (credit: Tim Vickers), Silver-backed viper (credit: Avi Nachmias), Black viper (credit: Václav Gvoždík), Common scaly viper (credit: Juan Lacruz), Common viper (credit: Charles J. Sharp) and Common viper (credit: Arbel Levy).