Abstract: A bird frightener that may be removably disposed adjacent a tree or bush that bears fruit or berries that are attractive to birds as food. The bird frightener includes a pole that supports a prime mover on the upper end thereof, which prime mover rotates a number of spaced outwardly extending arms above the upper portion of the tree or bush. Each arm has at least one streamer thereon that waves as the arm rotates. Cam means operatively associated with the invention causes the arm to move upwardly and downwardly in what appears to an observer to be an erratic motion as the arms rotate. The upward and downward movement of the arms as they rotate, coupled with the waving streamers, is effective in frightening birds away from a tree or bush that has the invention mounted adjacent thereto, and as a result the fruit or berries on the tree or bush are not eaten by birds.