Lanius
DeGeus, D. W. 1990. Productivity and habitat preferences of loggerhead shrikes inhabiting roadsides in a midwestern agroenvironment. Iowa State University, Ames, Iowa. MS thesis.
Morrison, M. L. 1981a. Population trends of the Loggerhead Shrike in the United States. American Birds 35(4):754-7.
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 Unpublished report submitted to the Minnesota chapter of the Nature Conservancy and Mi
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.
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.
DeGeus, D. W. 1991. Brown-headed cowbirds parasitize loggerhead shrikes: first records for family Laniidae. Wilson Bulletin 101(3):504-6.