Abstract: The trap consists of a pair of rings pivotally secured together at one side thereof in juxtaposition one with the other. A tension spring extends between offset portions on each ring and when the rings are substantially concentric one with the other, the spring is fully extended and biassing the rings to the nonconcentric or sprung position whereby an animal may be trapped between the lower portion of one ring and the upper portion of the other ring. The trap is held in concentric or set position either by means of a pan or foot treadle trigger mechanism adjacent the base of the rings or by a swinging trigger mechanism between the upper sides of the rings with the trigger or actuating members extending down across the area defined by the rings. This swinging trigger can operate the trap by movement of an animal through the rings in either direction and the trap can be used on land or in the water as desired.