See Bird Barrier's Bird-Shock Flex-Track in action! Bird-Shock Flex-Track is a low-profile ledge deterrent system that is effective against all species of pest birds utilizing the principle of fear and flight, conditioning birds to stay away. Flexible and Adaptable; a low-profile electrified track that conforms to any architectural configuration. Flex-Track curves up and down, and side to side; and the stainless steel strapping gladly follows the PVC base without wrinkling.