The Tiger, the Brahmin and the Jackal and asks to see the trap. Once there he claims he still doesn't understand. The tiger gets back in the trap to demonstrate and the jackal quickly shuts him in, suggesting to the brahmin that they leave matters thus. There are more than a hundred versions of this tale spread across the world. In some the released animal is a crocodile, in some a snake, a tiger and others a wolf. Some variants are very old, going back at least to the "Panchatantra" or "Fables of Bidpai" and the Jataka tales. In Europe it appeared some 900 years ago in
Tiger snake systematics previously applied, but most agree a revision of the genus is needed. Names for these subdivisions include the western types, appended to both species names as "occidentalis" (Glauert 1948) The island groups have also been described as subspecies: Chappell Island tiger snake as "N. ater serventyi" (Warrell, 1963), King Island and Tasmanian tiger snakes subspecies as "N. ater humphreysi", (Warrell, 1963) and the Peninsula tiger snake as "N. ater niger" (Kinghorn 1921). Island populations of "N. scutatus" have evolved larger heads to cope with large prey animals. Young populations have larger heads by phenotypic plasticity, whereas large heads have