The Junior Woodchucks are the Boy-Scout-like youth organization to which Donald Duck's nephews, Huey, Dewey and Louie, belong. The Junior Woodchucks are mentioned prominently in the Carl Barks comics.
The newphews always carry with them a copy of the Junior Woodchucks Guidebook, a fictional guidebook which is full of detailed and pertinent information about whatever country or situation in which Donald and the boys find themselves.