What are the recommended hole sizes for bird houses to attract specific bird species?

The recommended hole sizes for bird houses vary depending on the bird species you want to attract. Here are some common sizes:

• Bluebirds: 1.5 inches
• Chickadees: 1.125 inches
• Wrens: 1 inch
• Woodpeckers: 2 inches

Choosing the right hole size can help attract the specific bird species you want to see in your backyard.