Contents
American Birds Spring Guide April-june 1991
North American Birds
Birding for Fun
Paul R. Ehrlich
Facts, Inferences and Shameless Speculationsthe Sex Life of Birdsthe National Mutation Strategy
J. P. Myers
Paul Butler: Parrot Man of the Caribbean
Chris Wille
The Strange, Wonderful, Enduring Relationship of Man and Birds
Frank B. Gill and Joseph Ewing
Birders at War
Linn Varney
Shiny Cowbird Reaches Oklahoma
Joseph A. Grzybowski and Victor W. Fazio III
Black-backed Wagtail Nests on Attu Island, Alaska
George F. Wagner
Aggregations of Barn Owls in Abandoned Desert Mines
Robert Salter
Fifty-fourth Breeding Bird Census:1990
North American Birds
Forty-third Winter Bird-population Study:1990
North American Birds
The Changing Seasons Autumn 1990
Kenn Kaufman
Regional Reports the Autumn Migration August 1 - November 30, 1990
North American Birds
Letters to the Editor
North American Birds
Moments in Historythe Sex Life of Birdsthe National Mutation Strategythomas Say Goes to Colorado
John Farrand Jr.
American Birding
Pete Dunne
Pictorial Highlights Autumn 1990
North American Birds
Cover
Front Matter (PDF)
North American Birds