Through the years, I've made quite a few bird houses of my own. Through research and trial and error, here are some measurements that work. All of the below measurements are in inches with the exception of the last column, which is in feet
.
| Species |
Floor L X W |
Depth of Cavity |
Floor to Entrance |
Diameter of Entrance |
Height Above Ground to Mount |
| Eastern Bluebird |
5" X 5" |
8" |
6" |
1-1/2" |
5-10' |
| Western Bluebird |
5" X 5" |
8" |
6" |
1-9/16" |
5-10' |
| Mountain Bluebird |
5" X 5" |
8" |
6" |
1-9/16" |
5-10' |
| Chickadee |
4" X 4" |
8-10" |
6-8" |
1-1/8" |
6-15' |
| Titmouse |
4" X 4" |
8-10" |
6-8" |
1-1/4" |
6-15' |
| Nuthatch |
4" X 4" |
8-10" |
6-8" |
1-1/4" |
12-20' |
| Bewick's Wren |
4" X 4" |
6-8" |
4-6" |
1--1-1/4" |
6-10' |
| Carolina Wren |
4" X 4" |
6-8" |
4-6" |
1-1/2" |
6-10' |
| Purple Martin |
6" X 6" |
6" |
2" |
2-1/2" |
10-15' |
| Crested Flycatcher |
6" X 6" |
8-10" |
6-8" |
2" |
8-20' |
| Flicker |
7" X 7" |
16-18" |
14-16" |
2-1/2" |
6-20' |
| Red-Headed Woodpecker |
6" X 6" |
12-15" |
9-12" |
2" |
12-20' |
| Downy Woodpecker |
4" X 4" |
9-12" |
6-8" |
1-1/4" |
6-20' |
| Robin |
6" X 8" |
8" |
One or more sides open |
One or more sides open |
6-15' |
| Barn Swallow |
6" X 6" |
6" |
One or more sides open |
One or more sides open |
8-12' |
| Phoebe |
6" X 6" |
6" |
One or more sides open |
One or more sides open |
8-12' |
| Screech Owl |
8" X 8" |
12-15" |
9-12" |
3" |
10-30' |
| Wood Duck |
10 to 18" |
10-24" |
12-16" |
4" |
10-20' |