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               Floor         Depth      Entrance     Diameter       Height 

 Species     of Cavity     of Cavity   above Floor  of Entrance  above Ground

              (inches)     (inches)     (inches)     (inches)      (feet)





Bluebird       5 X 5          8            6           1 1/2         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)      6-15

Barn Swallow   6 X 6          6        (one or more sides open)      8-12

Phoebe         6 X 6          6        (one or more sides open)      8-12

Screech Owl    8 X 8        12-15         9-12           3          10-30

Wood Duck     10 - 18       10-24        12-16           4          10-20 

This resource is based on the following source: Jamestown, ND: Northern Prairie Wildlife Research Center Home Page. http://www.npsc.nbs.gov/resource/tools/birdhous/birdhous.htm

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