WHITEHORSE Bluebird House — Weatherproof Cedar Nest Box, 22" Floor, NABS-Spec & Predator-Resistant

WHITEHORSE Bluebird House is a weatherproof, cedar nest box built to National Association for Backyard Birders (NABS) dimensions for Western and Mountain Bluebirds and similar cavity nesters.

This handcrafted birdhouse uses durable 3/4" cedar, thoughtful ventilation and drainage, and predator-resistant features to create a long-lasting, safe nesting site for bluebirds, tree swallows, nuthatches and other small cavity-nesting birds. The design pairs NABS-recommended floor size and entrance dimensions with practical weatherproofing—angled vents, recessed door and floor, dado joints, and a stainless-steel entry guard—to keep nests dry and protected season after season. Easy cleanout and secure mounting make it simple to add to a trail or property for consistent nesting opportunities.

How does this birdhouse keep nests dry during rain and storms?

The BLUEHORSE design uses several construction details to shed water away from the interior and keep nest material dry. Vent holes are cut upward to block direct rain, and both the floor and door sit recessed 3/4" from the outer walls to reduce splash and wind-driven moisture. Dado joints create tighter seams that reduce drafts and water intrusion compared with simple butt joints.

• Upward-angled vent holes to prevent rain entry.
• Recessed floor and bottom-hinged door for splash protection.
• Dado joint construction for tighter, dryer seams.
• Floor drainage holes to remove any residual moisture.

What predator protections and materials keep birds safe?

This birdhouse uses sturdy, natural materials and mechanical guards to deter common predators. A stainless-steel plate reinforces the 1 9/16" entry hole against squirrels and woodpeckers, while an internal 1" wooden guard blocks larger predators like raccoons and cats from accessing the nest cavity. The use of 3/4" cedar provides a durable, rot-resistant shell without toxic finishes.

• 1 9/16" entry hole size suitable for bluebirds and similar species.
• Stainless-steel guard prevents hole enlargement by rodents or birds.
• 1" internal wooden guard to slow predators from reaching chicks.
• Cedar construction resists rot and natural weathering without chemicals.

How easy is it to install, clean, and maintain?

Installation and upkeep are straightforward so you can monitor and manage nesting seasons with minimal effort. A bottom-hinged door provides easy access for annual cleaning and nest checks without removing the house from its mount. The box is sized to fit standard posts or poles and works well in multi-house trails for encouraging breeding pairs over consecutive seasons.

• Bottom-hinged cleanout door simplifies seasonal maintenance.
• Fits typical post or pole mounting setups for quick installation.
• Compact 22 sq. in. floor (5.5" x 4") matches NABS recommendations.
• Durable construction reduces frequency of repairs or replacement.

Which bird species will use this nest box and why does size matter?

The house is sized and shaped to attract Western and Mountain Bluebirds, tree swallows, nuthatches and other small cavity nesters that prefer a 1 9/16" entry and approximately 22 square inches of floor space. Proper entrance and floor dimensions help exclude larger competitors while offering enough room for a brood and nest material. Using boxes built to recognized standards increases the chance of occupancy by target species.

• 1 9/16" entry hole preferred by bluebirds and similar species.
• 22 sq. in. floor area (5.5" x 4") meets NABS-style guidelines.
• Interior depth and ventilation designed for small cavity nesters.
• Works well in single placements or in trails of multiple boxes.

Who is this for: Homeowners, bird wardens, property stewards and backyard naturalists who want a reliable, long-lasting nest box built to accepted nest-site specifications. If you’re creating a bluebird trail, managing habitat for small cavity nesters, or simply want a low-maintenance, weatherproof birdhouse that resists predators and rot, the WHITEHORSE Bluebird House provides a practical, quality option crafted with field-minded details.