Contents
Sonograms as Aids in Bird Identification
Joseph C. Beaver
Seventy-five Years of Changes in Mallard - Black Duck Ratios in Eastern North America
Paul A. Johnsgard and Rose Disilvestro
Winter Population Trends in the Black and Turkey Vultures
Woodward H. Brown
The A. B. A. Checklist, a Review
Paul A. Debenedictis
On A. O. U. Check-list Species and Former Species
Michael Gochfeld
A Great-tailed Grackle from Illinois
H. David Bohlen
A Little Stint in Bermuda
Keith Pellow
The Changing Seasons
Robert J. Newman
The Nesting Season June 1 - July 31, 1976
North American Birds
Recent and Forthcoming Books
North American Birds
Choosing a Basic Ornithological Library
North American Birds
The Master List of Bird Books for North American Readers
North American Birds
An Annotated Selection of Regional Bird Books
North American Birds
The Last Word
North American Birds
Cover
Front Matter (PDF)
North American Birds