THE PRAIRIE NATURALIST Volume 22, No. 1 March 1990

Paul B. Kannowski, Editor Nikki R. Seabloom, Assistant Editor Douglas H. Johnson, Book Review Editor CONTENTS DUCK NESTING ON ISLANDS AT J. CLARK SALYER REFUGE IN NORTH DAKOTA, 1983–1984 ▪ A. D. Aufforth, H. Goetz, and K. F. Higgins PRODUCTION OF TALL-GRASS PRAIRIE HERBS BELOW EASTERN REDCEDAR ▪ S. D. Smith and J. Stubbendieck HABITAT BREADTH OF NONGAME RODENTS IN THE MIXED-GRASS PRAIRIE REGION OF NORTH CENTRAL KANSAS ▪ D. W. Kaufman, B. K. Clark, and G. A. Kaufman UNIONID MOLLUSCS IN THE BIG BEND REACH OF THE PLATTE RIVER, NEBRASKA ▪ M. D. Roedel POPULATION CHARACTERISTICS OF ROCK BASS IN THREE NORTHEASTERN SOUTH DAKOTA LAKES ▪ G. C. Hoffman, C. L. Milewski, and D. W. Willis A PROPOSED STANDARD WEIGHT (Ws) EQUATION FOR SAUGER ▪ C. S. Guy, E. A. Bettross, and D. W. Willis USE OF HELICOPTERS FOR SURVEYS OF NESTING RED-SHOULDERED HAWKS ▪ J. G. Cook and S. H. Anderson NOTES Distributional Records of the Great Plains Rat Snake in Dinosaur National Monument ▪ R. M. Engeman and A. Engeman First Record of Nominotypical Incisalia polia (Lepidoptera, Lycaenidae) for North Dakota ▪ R. A. Royer Displacement of White-tailed Deer by Flooding ▪ G. L. Dusek BOOK REVIEWS Common Range Forbs of Nebraska ▪ G. E. Larson North Dakota\u27s Wildflowers ▪ J. Sinner and M. J. Sinner A Potpourri of Predators ▪ D. L. Garshelis EDITORIAL POLICY ▪ Editor SUGGESTIONS FOR CONTRIBUTORS ▪ Editor Mailing Date: March 14, 199