Protect your martins from aerial attack with Excluder Gourd Owl Guards. These guards are designed to work with the Excluder Gourds only.
Made of aluminum, they are easily installed. Just snap into holes molded into Excluder Gourd and Excluder Porches and secure with 2 stainless steel screws (supplied).
No guard is fool-proof but they do make it more difficult for aerial predators (such as hawks, owls, and crows) to attack. Martins sitting on porches are protected from aerial hawk attacks, and nesting martins are protected from night time owl raids by providing needed space from entrance hole.
Sold in pairs. One pair needed per gourd.