Attached to any wooden birdhouse with a 1" to 1 1/2" opening, this tunnel-like fitting prevents predators such as raccoons, cats or larger birds from reaching into the nest to snatch the eggs or young. What appears to be a perch projecting below the opening is intended as a tail brace, which small birds can use for leverage as they enter the nest.

Made of durable ABS plastic, the tunnel measures about 2 1/2" long and secures using the included screws.

Made in USA.