The present invention relates to decoys for simulating the movement of animals on land, air, or water. The invention includes a small, enclosed, and portable unit that comprises a motor, a rechargeable power supply, a timing control mechanism, and a spool attached to a line. The line extends from the unit and attaches to one or more animal decoys and, at the end, to an anchoring mechanism (e.g., an anchor placed in the water or a tether attached to a tree or other stationary support). The anchoring mechanism preferably is attached to the line via a bungee cord or other flexible connection that exhibits elasticity. The preferred embodiment of the invention comprises four main parts: (1) a string portion, which extends from an anchor system to a mechanical unit； (2) one or more animal decoys attached to the string portion； (3) an anchor assembly attached to one end of the string assembly for creating tension in the string assembly and securing its position； and (4) a mechanical unit containing a low-power, motorized spool assembly, a rechargeable power supply, a spool, and a timing mechanism for repeatedly winding and releasing the string portion.
