In Argentinian mythology, the Lobisón (or Luisón) was a werewolf-like creature, a black or gray wolf the size of a small horse. According to legend, the 7th consecutive son in a family will become a lobison. They hunt at night under a full moon, preferring to prey on cattle rather than people. The 7th consecutive daughter born to a family will become a witch. This superstition was held into the 20th century, resulting in the seventh-born children being abandoned. The Argentine government passed a law forbidding this practice in the 1920s.