By stretching a nylon wire along the pond side, which is invisible for herons, the access to the pond will be blocked. The ringing noise of the little bells will prevent a heron from making another attempt. The Heron Stop can be applied simply and nearly invisibly. The length of the wire is sufficient to protect ponds with a circumference of 12.5 metres. The set contains 8 rods, 25 metres of nylon wire, 8 jingle bells.