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The Ospreys of the Yellowstone
M. P. Skinner

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Habits of the Magpie in Southeastern Washington
Lee R. Dice

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The Winter Migration of 1916-17 in the Northwest
J. Hooper Bowles

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Observations on Some Fresno County Birds
H. S. Swarth

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Some Birds of Central Oregon
Alex Walker

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Editorial Notes and News
O. Widmann

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Minutes of Cooper Club Meetings
Amelia S. Allen and L. E. Wyman

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Back Matter (PDF)
The Condor

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Front Matter (PDF)
The Condor

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Another Instance of Lead Poisoning in Ducks
Stanton Warburton

The Bohemian Waxwing in Colorado
Junius Henderson

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Fork-tailed Petrel and Baird Sandpiper in Southern California
L. E. Wyman

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Another Record of the European Widgeon from the State of Washington
Stanton Warburton

Notes from the Fresno District
Winifred N. Wear

Nesting of the Harris Hawk in Southeastern California
Leo Wiley

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Notes on the Black-crowned Night Heron near Denver
W. C. Bradbury

Some April Nesting Notes from the Vicinity of Buena Vista Lake, Kern County, California
G. Willett

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Cases of Early Nesting in the State of Washington
Stanton Warburton

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Review: How to Make Friends with Birds by Niel Morrow Ladd
Tracy I. Storer

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Review: Recent Publications by Edward Howe Forbish
Tracy I. Storer

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Review: a List of Avian Species for Which the Type Locality is South Carolina by Arthur Trezevant Wayne
H. S. Swarth

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Review: Pets, Their History and Care by Lee S Crandall
H. W. Grinnell