Black cats have long been associated with superstition in various cultures. In some traditions, they are seen as omens of bad luck, particularly if they cross one's path. This belief may stem from the Middle Ages when black cats were often linked to witchcraft and thought to be witches' familiars. Conversely, in other cultures, black cats are considered symbols of good fortune. For example, in Japanese folklore, they are believed to bring prosperity and happiness. Similarly, in Scottish tradition, a black cat's arrival at a home is seen as a sign of good luck and a prosperous future.