Witches Are Active Primarily at Night

Wow! That didn't take long. A few pages later: "Witches are active primarily at night, roaming about at great speed in skins of wolf, coyote and other animals (bear, owl, desert fox, crow)." So you know what that means. NAVAHO WITCHCRAFT by Clyde Kluckhohn is a book with an owl in it, like every other book. So what?