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DeGeus, D. W. 1990. Productivity and habitat preferences of loggerhead shrikes inhabiting roadsides in a midwestern agroenvironment. Iowa State University, Ames, Iowa. MS thesis.

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Morrison, M. L. 1981a. Population trends of the Loggerhead Shrike in the United States. American Birds 35(4):754-7.

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Brooks, B. L., and S. A. Temple. 1986. Progress Report on a study of the breeding habitat, distribution, and reproductive success of the Loggerhead Shrike in Minnesota. Unpublished report submitted to the Minnesota chapter of the Nature Conservancy and Mi

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Fruth, K. J. 1988. The Wisconsin Loggerhead Shrike Recovery Plan. Wisconsin Endangered Resources Report 38. Bureau of Endangered Resources, Wisconsin Department of Natural Resources, Madison, Wisconsin.

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Haas, C. A., and S. A. Sloane. 1989. Low return rates of migratory Loggerhead Shrikes: winter mortality or low site fidelity? Wilson Bulletin 101(3):458-60.

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DeGeus, D. W. 1991. Brown-headed cowbirds parasitize loggerhead shrikes: first records for family Laniidae. Wilson Bulletin 101(3):504-6.

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