 |  |  |  |  | |
| *Avg height | 7.1″ | 7.7″ | 6.0″ | 8.7″ | 6.5″ |
 |  |  |  |  | |
| *Avg height | 6.9″ | 9.5″ | 8.8″ | 5.9″ | 9.8″ |
*Height from:
Karl E. Karalus, Allan W. Eckert, (1987). The Owls of North America. New York: Weathervane Books and the Owl Research Institute ( www.owlresearchinstitute.org )