“Rougarou” represents a variant pronunciation and spelling of the original French loup-garou. According to Barry Jean Ancelet, an academic expert on Cajun folklore and professor at the University of Louisiana at Lafayette in America, the tale of the rougarou is a common legend across French Louisiana. Both words are used interchangeably in southern Louisiana. Some people call the monster rougarou; others refer to it as the loup-garou.
The rougarou legend has been spread for many generations, either directly from French settlers to Louisiana (New France) or via the French Canadian immigrants centuries ago.
In the Cajun legends, the creature is said to prowl the swamps around Acadiana and Greater New Orleans, and the sugar cane fields and woodlands of the regions. The rougarou most often is described as a creature with a human body and the head of a wolf or dog, similar to the werewolf legend.