Protect baby birds from predators! Install a guardian tube in any 1-1/4 to 1-1/2 inch house entry hole. Tail support promotes easy entry for qualified entrants!Crows, starlings, blue jays and other possible predators such as cats and raccoons can’t get through or reach past the narrow opening. Permanently mounts to bird house with 3 screws. Base measures 2-3/4 inches.
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