Abstract: Disclosed are exemplary embodiments of mechanical assemblies or systems that may be used to create or provide various motions in animal decoys, such as in a decoy of a duck, goose, turkey, deer, dove, crow, coyote, among other types of birds, mammals, etc. For example, a mechanical assembly or system disclosed herein may be used to create or provide sweeping (e.g., rotation left-to-right and right-to-left, etc.) motions and/or peck (e.g., pivoting up-and-down, etc.) feeding motions for wild bird decoys (e.g., ducks, geese, dove, crow, drake, etc.).