Carolina Wren Nesting Box
The following nest box may be used by any one of the below cavity-nesting birds:
- Carolina Wrens
- Tree Swallows and Violet-green Swallows
- House Sparrows
- Chickadees, Titmice
Suitable Nestbox Size: ~ 8 - 9 inches high x 6.5 inches wide x 7 inches deep. Mount about 5 to 6 feet high on a metal pole. No perches at the entrance holes as they would aid predators.
Floor Dimensions: at least 4" x 4" .
Material to be used: Red Cedar (more durable than other wood material), rough cut boards or exterior-grade plywood at least 1/2" thick. Unpainted. Ventilation openings in the floor and under the roof. Although some experts disagree with the notion that ventilation openings are needed at all. Please refer to this article for further information. This may also depend on location of nest box, exposure to direct sun as well as material used to build the nest box.
Entrance Hole: About 1.5 in diameter to keep the larger birds out, about 8 inches above the floor.
Roof: Hinged, secured with shutter hooks. Sloped down, overlapping on the sides and the front reduces exposure to rain and makes it more difficult for predators to get to the chicks or eggs.
Hardware: Best to use corrosion resistant, stainless steel and dichromate plated screws
Predator Guard: An inverted metal cone attached below the nextbox will provide some protection against predators.
Mount on a tree, post, fence or wall, ideally about four and twelve feet high with partial sun and shade (see the Carolina Wren bird species page for specific habitat and mounting instuctions.)
Position nest far enough from roads, paths or trails to minimize disturbance.
Take nest box down after each breeding season, and repair and sanitize before reusing.
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