| TYPE OF BIRD | SIZE GOURD | SIZE HOLE |
| House or Bewick' Wren | 6" | 1" |
| Carolina Wren | 6" | 1 1/2" |
| Chickadee | 8" | 1 1/8" |
| Tufted Titmouse | 8" | 1 14" |
| Downy Woodpecker | 8" | 1 1/4" |
| White Breasted Nuthatch | 8" | 1 1/4" |
| Small Owl | 10" | 2 1/4" |
| Bluebird | 8" | 1 1/2" |
| Hairy Woodpecker | 12" | 1 5/8" |
| Crested Flycatcher | 8" | 2" |
| Purple Martin | 10" | 2 1/2" |
| Flicker | 16" | 2 1/2" |
