========+==========+=========
| Floor | Depth | Entrance | Diameter | Height
Species. | of | of | above | of | above
| cavity. | cavity. | floor. | entrance.| ground.
-----------------+----------+----------+----------+----------+---------
| _Inches._| _Inches._| _Inches._| _Inches._| _Feet._
Bluebird | 5 by 5 | 8 | 6 | 1-1/2 | 5 to 10
Robin | 6 by 8 | 8 | [1] | [1] | 6 to 15
Chickadee | 4 by 4 | 8 to 10 | 8 | 1-1/8 | 6 to 15
Tufted titmouse | 4 by 4 | 8 to 10 | 8 | 1-1/4 | 6 to 15
White-breasted | | | | |
nuthatch | 4 by 4 | 8 to 10 | 8 | 1-1/4 | 12 to 20
House wren | 4 by 4 | 6 to 8 | 1 to 6 | 7/8 | 6 to 10
Bewick wren | 4 by 4 | 6 to 8 | 1 to 6 | 1 | 6 to 10
Carolina wren | 4 by 4 | 6 to 8 | 1 to 6 | 1-1/8 | 6 to 10
Dipper | 6 by 6 | 6 | 1 | 3 | 1 to 3
Violet-green | | | | |
swallow | 5 by 5 | 6 | 1 to 6 | 1-1/2 | 10 to 15
Tree swallow | 5 by 5 | 6 | 1 to 6 | 1-1/2 | 10 to 15
Barn swallow | 6 by 6 | 6 | [1] | [1] | 8 to 12
Martin | 6 by 6 | 6 | 1 | 2-1/2 | 15 to 20
Song sparrow | 6 by 6 | 6 | [2] | [2] | 1 to 3
House finch | 6 by 6 | 6 | 4 | 2 | 8 to 12
Phoebe | 6 by 6 | 6 | [1] | [1] | 8 to 12
Crested | | | | |
flycatcher | 6 by 6 | 8 to 10 | 8 | 2 | 8 to 20
Flicker | 7 by 7 | 16 to 18 | 16 | 2-1/2 | 6 to 20
Red-headed | | | | |
woodpecker | 6 by 6 | 12 to 15 | 12 | 2 | 12 to 20
Golden-fronted | | | | |
woodpecker | 6 by 6 | 12 to 15 | 12 | 2 | 12 to 20
Hairy woodpecker | 6 by 6 | 12 to 15 | 12 | 1-1/2 | 12 to 20
Downy woodpecker | 4 by 4 | 8 to 10 | 8 | 1-1/4 | 6 to 20
Screech owl | 8 by 8 | 12 to 15 | 12 | 3 | 10 to 30
Sparrow hawk | 8 by 8 | 12 to 15 | 12 | 3 | 10 to 30
Saw-whet owl | 6 by 6 | 10 to