A strange black cat on a porch brings prosperity to the owner. (Scottish Lore)
A black cat seen from behind portends a bad omen. (And a black cat seen from the front is a GOOD Black Cats and Witches
Black cats have long been associated with witches and witchcraft to the extent that during October, the Month of Halloween, black cats and witches are favorite icons used for costumes, home decor, and party themes. This trend is so embedded in modern society that we've forgotten that the modern holiday we celebrate as Halloween has ancient beginnings as well as names: