References: 



Bent, A. C. 1938. Life histories of North American birds of prey (Part 2). 



U.S. Nat. Mus. Bull. 170:202-213. 

 Forsman, E. 1973. in lit. 

 Johnson, N. K. 1971. in lit. 



Marshall, J. T. , Jr. 1942. Food and habitat of the spotted owl. Condor 44: 66-67. 

 Wight, H. M. 1971. in lit. 

 Wight, H. M, 1972. in lit. 



160 



