Contents
Sex and Age Characters and Salivary Glands of the Chimney Swift
David W. Johnston
Hybridization in the Red-eyed Towhees of Mexico: the Eastern Plateau Populations
Charles G. Sibley and David A. West
Morning and Evening Song of Robins in Different Latitudes
Robert C. Miller
Distribution and Migration of Races of the Mourning Dove
John W. Aldrich and Allen J. Duvall
Classification and Systematic Position of the Eiders
Philip S. Humphrey
Notes and News
The Condor
Cooper Society Meetings
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
From Field and Study
Further Records from the Pleistocene of Newport Bay Mesa, California
Hildegarde Howard
Notes on the Red Crossbill in Nevada
Ned K. Johnson
Jungle and Domestic Fowl, Gallus Gallus, in the Philippines
D. S. Rabor and A. L. Rand
A Correction in Identification of the Zone-tailed Hawk as a Mexican Black Hawk
Wayne H. Bohl and Elmo Traylor
Specific Relationships in the Genus Elanus
Kenneth C. Parkes
Red-tailed Hawk Feeds on Crickets
Robert T. Orr
Cape May Warbler in Nicaragua
Thomas R. Howell