Northern Prairie Wildlife Research Center
Except for 1966, the senior author assisted with research in all years 1964-85. Principal studies of this report were designed and supervised by L. M. Kirsch during 1964-79 and by K. F. Higgins during 1979-95. Associated studies were supervised by K. D. Bayha, H. F. Duebbert, T. J. Dwyer, A. T. Klett, and H. W. Miller.
For their efforts to plan and staff this research, we thank I. G. Bue (deceased), W. R. Goforth, H. W. Miller, H. K. Nelson, P. F. Springer, and R. C. Stendell. We also thank H. L. Clark for designing, building, and maintaining all phases of equipment throughout the years and for assisting with field activities. We also thank seasonal employees J. R. Alford, III, I. J. Ball, Jr., A. Banks, J. Brott, R. Brown, J. M. Callow, K. W. Campbell, D. Carney, W. F. Clark, S. T. Dillon, T. J. Dwyer, T. B. Gabbert, J. Geringer, R. Glasgow, B. J. Hoggarth, R. F. Johnson, R. J. King, R. L. Krenz, W. N. Ladd, Jr., E. Larson, S. A. Mickley, W. Norling, R. B. Oetting, L. H. Olson, A. Schlenker, L. S. Strecker, D. D. Stuglemeyer, S. Thompson, D. L. Trauger, M. E. Westfahl, D. O. Wick, S. Wick, S. D. Wilds, and R. O. Woodward. For permission to trespass, we thank J. Anderson, J. Bohl, Jr., W. Holzworth, G. Hotchkiss, H. Krenz, R. Kutz, K. Rickford, and M. Stoppleworth. For typing this manuscript, we thank T. G. Hanson, M. K. Liberda, and T. L. Sharp. D. A. Davenport, A. M. Frank, D. H. Johnson, C. L. Nustad, T. L. Shaffer, and D. W. Sparling provided data computerization and statistical analysis assistance. Editorial assistance was provided by C. E. Korschgen, R. B. Oetting, T. L. Shaffer, and A. S. Zimmerman; we thank W. F. Jensen, C. R. Luna, M. I. Meyer, D. E. Sharp, D. W. Sparling, L. K. Stevenson, R. D. Thielman, and R. O. Woodward for help with the drafting and figures. R. Blank-Librd provided the cover art.