Diy Wooden Bird Feeders . Shorten the screws to the required length with a junior hacksaw and screw in. 24) squirrel proof bird feeder. Homemade Wooden Bird Feeders Birdcage Design Ideas from birdcageideas.com The 4×4 bird feeder post uses, as the name suggests, a 4×4 post. 23) easy diy bird feeder. Wood is a warm and pleasant material.