The Squirrel Buster Mini™ is guaranteed Squirrel Proof. Openings in the bottom of the metal mesh shroud are aligned with the seed tray and allow birds access to the seed. When a squirrel climbs onto the feeder, its weight automatically forces the shroud down, closing access to the seed tray. Squirrels are shut out but not harmed in any way.
Both perching & clinging birds love this feeder. The seed ports have perches for the perching birds but the metal mesh shroud also offers a large clinging area. Because of the combined perching & clinging surfaces, you will find an enhanced level of bird activity with the Squirrel Buster Mini™
The Negative Grip Tube™ is part of the patented Squirrel Buster Mini™ technology. It prevents squirrels from grabbing the wire hanger with their hind legs, hanging down alongside the feeder & defeating the closing mechanism.