Typical Bird House Specifications.
| Bird | Floor Area in Inches | Depth in Inches | Entrance Above Floor in Inches | Diameter of Entrance in Inches | Height From Ground in Inches |
| Bluebird | 5×5 | 8 | 6 | 1½ | 5-10 |
| Robin | 6×8 | 8 | [A] | [A] | 6-15 |
| Chickadee | 4×4 | 8-10 | 8 | 1⅛ | 6-15 |
| Tufted Titmouse | 4×4 | 8-10 | 8 | 1¼ | 6-15 |
| White-breasted Nuthatch | 4×4 | 8-10 | 8 | 1¼ | 12-20 |
| House Wren | 4×4 | 6-8 | 1-6 | ⅞ | 6-10 |
| Bewick Wren | 4×4 | 6-8 | 1-6 | 1⅛ | 6-10 |
| Carolina Wren | 4×4 | 6-8 | 1-6 | 1⅛ | 6-10 |
| Dipper | 6×6 | 6 | 1 | 3 | 1-3 |
| Violent-Green Swallow | 5×5 | 6 | 1-6 | 1½ | 10-15 |
| Tree Swallow | 5×5 | 6 | 1-6 | 1½ | 10-15 |
| Barn Swallow | 6×6 | 6 | [A] | [A] | 8-12 |
| Martin | 6×6 | 6 | 1 | 2½ | 16-20 |
| Swallow | 6×6 | 6 | 1 | 2½ | 16-20 |
| Song Sparrow | 6×6 | 6 | [B] | 1-3 | |
| Crested Flycatcher | 6×6 | 8-10 | 8 | 2 | 8-20 |
| Red-headed Woodpecker | 6×6 | 12-15 | 12 | 2 | 12-20 |
| Golden-Fronted Woodpecker | 6×6 | 12-15 | 12 | 1½ | 12-20 |
| Hairy Woodpecker | 6×6 | 12-15 | 12 | 1½ | 12-20 |
| Downy Woodpecker | 4×4 | 8-10 | 8 | 1¼ | 6-20 |
| Screech Owl | 8×8 | 12-15 | 12 | 3 | 10-30 |
| Sparrow Hawk | 8×8 | 12-15 | 12 | 3 | 10-30 |
| Saw-Whet Owl | 6×6 | 10-12 | 10 | 2½ | 12-20 |
| Barn Owl | 10×18 | 15-18 | 4 | 6 | 12-18 |
| Wood Duck | 10×18 | 10-15 | 3 | 6 | 4-20 |