ILLINOIS AUDUBON BULLETIN 33 
Literature Cited 
Birkenholz, D. E. 1973. Habitat relationships of grassland birds at Goose 
Lake Prairie Nature Preserve, p. 63-66, in Hulbert, L. C. (Ed.) Third 
Midwest Prairie Conf. Proc., Kans. State Univ. Manhatten, 91 pp. 
. 1975. The summer birds of Goose Lake Prairie Nature Preserve, 
1970-1973. Chicago Acad. Sci. Nat. Hist. Miscell. No. 193, 11 pp. 
Breckenridge, W. J. 1935. An ecological study of some Minnesota March 
Hawks. Condor 37: 268-276. 
Brown, L., and D. Amadon. 1968. Eagles, hawks, and falcons of the world. 
Vol. 1, McGraw Hill. 
Craighead, J., and F. Craighead. 1956. Hawks, owls and wildlife. The 
Stackpole Co. 
Errington, P. L. 1930. Territory disputes of three pairs of nesting Marsh 
Hawks. Wilson Bull. 42: 237-239. | 
Hamerstrom, F., and D. De La Ronde Wilde. 1973. Cruising range and 
roosts of adult harriers. Inland Bird Banding News 45: 123-127. 
Hecht, W. R. 1951. Nesting of the Marsh Hawk at Delta, Manitoba. Wilson 
Bull. 63: 167-176. 
Yocum, C. F. 1941. Evidence of polygamy among Marsh Hawks. Wilson 
Bull. 56: 116-117. 
—Dept. of Biological Sciences 
Illinois State University 
Normal, IL 61761 
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