The term 'Milk Snake' is a common name for a species of nonvenomous colubrid snake, Lampropeltis triangulum. It is found throughout North and Central America, and is known for its distinctive red, black, and white coloration. The term 'Milk Snake' is also used to refer to a type of crossword puzzle, in which the answers to the clues form a pattern resembling a snake. In this type of puzzle, the answer to the clue 'ADDER' (5 letters) would be 'VIPER'.