Wives who fear that their husbands may be straying often resort to the use of concealed chameleon meat or bones in their husband's food in the belief that this will restore his fidelity. In Tunisia, it is also a traditional practice to slaughter a chameleon and bury it in the foundations of new buildings as a protection against the 'evil eye', or bad luck. The chameleon is also believed, in some places, to be a strong foe of snakes, which it attacks and kills in the following manner; the chameleon proceeds along the bough of a tree, beneath which the serpent sleeps. Placing itself immediately above the snake's head, the chameleon discharges a glutinous thread of saliva, which, upon contact with the snake soon kills it.