ROOSTER WB16 Gargler Bird House Nest by Douglas Fey

t" on the back of the Bird Gargler.?Note: If you choose to install the Gargler.? on a tree you must check the Gargler? regularly. The tree grows out rather than up and will exert pressure between the bark and the Gargler? as the tree grows. This pressure will cause the Gargler? to break at the back. The insertion of a rubber washer as a cushion between the tree bark and the Gargler? will help reduce the pressure for a short time. Even with a washer cushion the Gargler? should be checked periodically.