Bird House Dimensions

Birdhouse Dimensions Chart

Follow the chart below to determine the proper nest box dimensions for each bird species. Not all birds will use a nesting cavity, but those that will do have preferences for the dimensions of the box and the diameter of the entrance hole. Not all birds will follow this chart, so don’t be surprised if another bird decides to nest in a box you intended for someone else!

 

WILD BIRD
SPECIES
FLOOR SIZE BOX HEIGHT ENTRANCE
ABOVE FLOOR
¬†American Robin* 7″ x 8″ 8 “ —- —- 6-15′
Barn Owls 10″ x 18″ 15-18″ 4″ 6″ 12-18′
Bluebirds 5″ x 5″ 8-12″ 6-10″ 1 1/2 to 1 9/16″ 4-6′
Chickadees 4″ x 4″ 8-10″ 6-8″ 1 1/8″ 4-15′
Common & Northern Flicker 7″ x 7″ 16-18″ 14-16″ 2 1/2″ 6-20′
Flycatchers 6″ x 6″ 8-12″ 6-10″ 1 1/2 to 1 3/4″ 5-15′
House Finch 6″ x 6″ 6″ 4″ 2″ 8-12′
House Sparrows 4″ x 4″ to 5″ x 5″ 9-12″ 6-7″ 1 3/16 – 2″
Nuthatches 4″ x 4″ 8-10″ 6-8″ 1 1/4 to 1 3/8″ 5-15′
Osprey 48″ x 48″ Platform —- —- —- —-
Phoebes* 6″ x 6″ 6″ —- —- 8-12′
Purple Martins 6″ x 6″ 6″ 1-2″ 1 3/4″ – 2 1/4″ 10-15′
Downy Woodpecker 4″ x 4″ 8-10″ 6-8″ 1 1/4″ 5-15′
Hairy Woodpecker 6″ x 6″ 12-15″ 9-12″ 1 1/2″ 8-20′
Pileated Woodpecker 8″ x 8″ 16-24″ 12-20″ 3×4″ 15-25′
Red-Bellied Woodpecker 6″ x 6″ 12-15″ 9-12″ 2 1/2″ 10-20′
Red-Headed Woodpecker 6″ x 6″ 12-15″ 9-12″ 2″ 10-20′
Red-Tailed Hawk and Great Horned Owl 24″ x 24″ Platform —- —- —- —-
Screech Owls and Kestrels 8″ x 8″ 12-15″ 9-12″ 3″ 10-30′
Barn Swallows* 6″ x 6″ 6″ —- —- 8-12′
Violet-Green and Tree Swallows 5″ x 5″ 6-8″ 4-6″ 1 1/2″ 5-15′
Titmice 4″ x 4″ 10-12″ 6-10″ 1 1/4″ 5-15′
Prothonotary Warbler 5″ x 5″ 6″ 4-5″ 1 1/8″ 4-8′
Wood Ducks 10″ x 18″ 10-24″ 12-16″ 4″ 10-20′
Wrens 4″ x 4″ 6-8″ 4-6″ 1 to 1 1/2″ 5-10
Yellow-Bellied Sapsucker 5″ x 5″ 12-15″ 9-12″ 1 1/2″ 10-20′
*Prefers a nesting shelf.

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