Why do you bury snake heads?

You bury a venomous snake's head because other animals or insects like wasps, bees and mosquitoes that are attracted to liquid like substances such as water are drawn to the venom. Wasps in particular will use mud and the venom (because it is a water like substance) to build their nests. The venom will remain in the wasp's system, causing them to be poisonous and deadly if they sting you.