Duncraft.com: Fly Catcher Swallow Bird House
Fly Catcher Bird House with Noel Guard - A barrier that protrudes 4-3/4 inches from the entrance hole, protects nestlings from intruders, and provides them the security to care completely for their families until the nestlings successfully fledge the nest.
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Protect bluebird nestlings from cats, squirrels, and others Produce healthy, flight-ready fledglings! Your baby bluebirds stay safe because this Bird-Safe® Bluebird House with Noel Guard restricts cats and raccoons. While raised mesh flooring protects the nestlings from blowfly