THE PRAIRIE NATURALIST Volume 13, Number 1. March 1981

EDITOR: Dr. Paul B. Kannowski BOOK REVIEW EDITOR: Douglas H. Johnson TABLE OF CONTENTS WATERFOWL USE OF A MUNICIPAL SEWAGE LAGOON ▪ G-A. D. Maxson MASS MORTALITY OF MUSSELS FROM SLUMPING ALONG THE RED LAKE RIVER NEAR CROOKSTON, MINNESOTA ▪ A. M. Cvancara, D. J. Brown, D. K. Cudworth, and T. R. Klett CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA — 1980 ▪ R. N. Randall BREEDING BIRDS ON WATERFOWL PRODUCTION AREAS IN NORTHEASTERN NORTH DAKOTA ▪ H. F. Duebbert FURTHER EVIDENCE OF MARSH HAWKS FEEDING ON DUCKS ▪ R. A. Wishert, R. M. Kaminski, and D. W. Soprovich FIRST NEST RECORDS FOR RED-BREASTED NUTHATCH IN NORTH DAKOTA ▪ S. Lambeth, D. Lambeth, G. Lambeth, T. Gatz, and D. Treasure DISTRIBUTION OF RICHARDSON\u27S GROUND SQUIRREL IN EASTERN MONTANA ▪ J. E. Swenson NOTES A Mated Pair of Eastern and Mountain Bluebirds in North Dakota ▪ T. Gatz, R. Quanrud, and R. N. Randall Ferruginous Hawk Breeding Documented in Sargent County, North Dakota ▪ R. Schmid