Portal Guard
That round metal guard around the birdhouse hole is called a portal guard or portal protector. They come various sizes. The one shown is for bluebirds and is 1 1/2″ in diameter. The object of the guard is to keep animals such as squirrels from enlarging the hole and thus endangering the chicks. They’re easy to put on and every wild bird store will carry them.

- Posted by   Bird_Ready Bird_Ready
- Posted in Backyard Birds
 Jan, 24, 2017 Jan, 24, 2017
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