Table 2 — Information on nesting

Species Entrance hole diameter (cm) Width of floor panels (cm) Height of wall panels (cm) Min. height above ground (m) On pole or tree near shrubs On pole or tree in open areas House Wren 2.5 10 x 10 15 1.8 yes — Chickadees Nuthatches Downy Woodpecker 3.1 3.1 3.1 10 x 10 10 x 10 10 x 10 20 20 20 1.8 1.8 1.8 yes yes yes — — — Bluebirds Tree Swallow House Sparrow 3.8 3.8 3.8 13 x 13 13 x 13 13 x 13 25 25 25 2.1 2.1 2.1 — — — yes yes yes Red-headed Woodpecker 4.4 13 x 13 31.3 3 — yes Hairy Woodpecker Great Crested Flycatcher Starlings 5.0 5.0 5.0 12.5 x 12.5 12.5 x 12.5 12.5 x 12.5 31.3 31.3 31.3 3 3 3 — — — yes yes yes Common Flicker Bufflehead 6.3 6.3 15 x 15 15 x 15 37.5 37.5 3 3 — — yes yes Screech owls American Kestrel 7.5 7.5 20 x 20 20 x 20 42.5 42.5 4.5 4.5 — — yes yes Wood Duck Hooded Merganser Common Goldeneye 7.5 x 10 oval 7.5 x 10 oval 7.5 x 10 oval 25 x 25 25 x 25 25 x 25 50 50 50 2.4 2.4 2.4 yes yes yes yes yes yes Purple Martin 5 15 x 15* 15 2.4 — yes
*Inside floor area.	Back to top