Links and resources:
This is the tenth post in a series on this bluebird family. To see all of the posts in this series visit the link, bluebird family. The most recent post will be first. You may also enjoy Wishing Upon a Bluebird at Vickie's Sketchbook and my June article for Wild Birds Unlimited, Having Fun with Bluebirds.
Find instructions for making nest box predator guards by clicking the link. These guards have worked to keep the 9" arm of a raccoon out and have prevented prowling cat predation, as well as snakes. A 7-inch depth is recommended. You may also find a version of these guards at the Wild Birds Unlimited store nearest you.
Upcoming: A parent attends to the swallow reflex, and bluebirds loving water.