Bluebirds are beloved for their vibrant plumage and gentle song, but attracting them to your backyard can be a challenge. One of the biggest hurdles is competition from other, more aggressive bird species that may try to take over your bluebird houses. This guide provides practical strategies to deter unwanted guests and ensure your bluebirds have a safe and successful nesting season.
Understanding the Competition
Before you can effectively keep other birds out, you need to know who you're dealing with. Common intruders include:
- House Sparrows: These highly aggressive birds are notorious for taking over bluebird houses. They are larger and more assertive than bluebirds.
- European Starlings: Similar to house sparrows, starlings are aggressive and readily occupy nesting boxes. Their size makes it difficult for bluebirds to compete.
- Chickadees & Wrens: While generally not as aggressive as sparrows or starlings, these smaller birds might still attempt to nest in bluebird houses, especially if other options are limited.
Effective Strategies to Protect Your Bluebird Houses
Several proven methods can help you keep unwanted birds away from your bluebird houses:
1. Choosing the Right House
The design of your bluebird house plays a crucial role. Consider these features:
- Appropriate Size: Use a bluebird house with a 1.5-inch diameter entrance hole. This size is generally too small for house sparrows and starlings but large enough for bluebirds.
- Location: Position your bluebird house in an open area with ample space around it, minimizing potential hiding spots for unwanted birds. Avoid placing it near dense shrubs or trees.
- Material: Choose durable, weather-resistant materials that can withstand the elements and deter birds from easily damaging the structure.
2. Exclusion Devices
These devices physically prevent larger birds from entering the house:
- Entrance Hole Reducer: This is a simple, effective method. A smaller entrance hole specifically designed for bluebirds will deter larger intruders.
- Inner Baffle: Installing a baffle inside the house can block access for larger birds while still allowing bluebirds to enter. This prevents them from reaching the nesting compartment.
3. Monitoring and Maintenance
Regular monitoring is key:
- Frequent Checks: Check the bluebird house regularly to ensure that no unwanted birds have moved in. Remove any nests or eggs laid by other species.
- Cleaning: Clean the house thoroughly between nesting seasons. This removes any lingering scents that might attract unwanted birds.
4. Predator Protection
While this doesn't directly deter other birds, it's crucial to safeguard the bluebirds from predators:
- Cat Deterrents: Protect the area around the bluebird house from cats.
- Secure Mounting: Securely mount the house to prevent it from being easily knocked down or reached by predators.
5. Providing Alternative Nesting Sites
Sometimes, simply offering more nesting options in your yard can reduce competition:
- Other Birdhouses: Consider installing birdhouses specifically designed for other species, thus reducing pressure on your bluebird houses.
Patience and Persistence are Key
Remember, keeping other birds out of your bluebird houses requires patience and consistency. Don't get discouraged if you experience setbacks. By implementing these strategies and adapting your approach as needed, you can significantly increase your chances of successfully attracting and supporting a thriving bluebird family in your backyard. Enjoy the rewarding experience of witnessing these beautiful birds raise their young!
