The Prairie Naturalist

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Volume 12, Nos. 3 and 4	September-December 1980
Paul B. Kannowski, Editor Douglas H. Johnson, Book Review Editor

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TABLE OF CONTENTS
The Flora and Sandhills Prairie Communities of Arapaho Prairie, Arthur County, Nebraska
K. H. Keeler, A. T. Harrison and L. S. Vescio	65
Use of Ultrasonic Sound to Estimate Body Fat Deposits in The Mallard
G. A. Baldassarre, R. J. Whyte and E. G. Bolen	79
Northern Mockingbird Breeding in North Dakota
D. Child, J. Fontaine, T. Gatz, M. Johnson and J. Oswald	87
Spring Arrival of Birds at Woodworth, North Dakota
K. F. Higgins, L. M. Kirsch and J. M. Callow	89
Hybridization and Taxonomic Status of Greater Prairie Chickens and Sharp-Tailed Grouse (Hybridization in Grouse)
D. W. Sparling	92
Snow Geese Breeding in North Dakota
J. G. Sidle and G. E. Erickson	103
Seasonal Changes in Habitat use and Flock Size by Black-Billed Magpies Along The Lower Yellowstone River, Montana
J. E. Swenson	105
Adaptations of Common Terns Nesting on An Inland Reservoir
B. C. Pinkowski	111
Manipulation of Wheat and Oat Preferences in Black-Tailed Prairie Dogs: A Field Demonstration Using Methiocarb as a Taste Aversion Agent
G. A. Holzer and C. R. Gustavson	114
Recent Records of Mammals from Southwestern North Dakota
R. W. Seabloom, M. G. McKenna and R. D. Crawford	119

NOTES
Green Heron Nesting in North Dakota S. Lambeth				109
Second Record of Fulvous Whistling Duck for North Dakota D. O. Lambeth and G. S. Lambeth	110
First Record of a Worm-eating Warbler for North Dakota G. S. Lambeth					113
BOOK REVIEW
Birds of the Great Plains C. A. Faanes and H. A. Kantrud		124
A Government Looks at Its Wetlands Staff			125
A Mushroom Booklet Staff			126
INDEX TO VOLUME 12			127

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