This trap is simple to use with proven results. When deployed the trap lays flat like an open suitcase. When birds disturb the food tray the trap is triggered causing the spring loaded nylon net to swing completely around and close over the birds to trap them quickly and safely. The snap trap is powder coated for rust resistance. Net is weather treated with a special green weather-protective coating for longer net life. This trap can be mounted on buildings, walls, and can even be put in trees. Designed to capture grackles, crows, ducks, and similar sized birds.