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Shrike Studies

1988, 1989,   Brett Tiller

Loggerhead shrike (Lanius ludovicianus) were studied in the spring and summer of 1988 and 1989 on the Hanford Reservation in south-eastern Washington state. There were 3 objectives of the study: 1) describe the breeding chronology and reproductive success of loggerhead shrikes; 2) determine shrike density in various plant communities during the nesting season; and 3) investigate nest site selection by shrikes in shrub-dominated plant communities. This data file contains only the locational data for shrike nests, i.e., the coordinates for the sitings. Locational data is in UTM's using Clark66 (NAD27) datum and zone 11.

The study site was restricted to areas of the Hanford Reservation lying south and west of the Columbia River. Surveys were conducted by slowly driving (8-20 km/hr) along nearly all roads between March and June. This was a 154 km vehicular transect. The transect was completed once a month between April and August 1989. The location of each nest was mapped and the behavior and age(adult or fledgling) of each shrike recorded. Each location was observed three or more times to verify that the nest was in an active breeding territory.

Additional information can be obtained from: "Reproductive Success and Nesting Habitat of Loggerhead Shrikes in Shrubsteppe Communities," by Linda D. Poole. Submitted for a Master of Science degree in Wildlife Science to Oregon State University, May 1992.

For information on additional studies, please go to the Ecological Monitoring and Compliance Project website.