Contents
Habitat Selection in Blue Grouse
J. F. Bendell and P. W. Elliott
The Water Economy of the Black-throated Sparrow and the Rock Wren
Michael Smyth and George A. Bartholomew
An Additional Character Linking Ratites and Tinamous, and an Interpretation of Their Monophyly
Kenneth C. Parkes and George A. Clark Jr.
Annual Gonadal Cycles and Pituitary Gonadotropins in Zonotrichia Leucophrys Gambelii
James R. King, Brian K. Follett, Donald S. Former, and Martin L. Morton
Autumn Weights of Blue Grouse in North-central Washington, 1954 to 1963
Fred C. Zwickel, James H. Brigham, and Irven O. Buss
Spermatogenesis in Bald Eagles Experimentally Fed a Diet Containing Ddt
Louis N. Locke, Nicholas J. Clara, and Paul A. Stewart
News and Notes
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Communications
Notes on the Uruguayan Population of Larus Belcheri
Rodolfo Escalante
Wanderings of the Ancient Murrelet: Some Additional Comments
Nicolaas A. M. Verbeek
Albinistic Feathers in Storm Petrels (hydrobatidae)
Luis F. Baptista
Egg of the Great Black Hawk, Buteogallus Urubitinga Ridgwayi
Frank A. Hartman
A Record of Stingray Predation by the Brown Pelican
Dennis L. Bostic and Richard C. Banks
Inland Record of an Olsquaw in California
Roger O. Wilbur
Some Land Birds in the Caribbean
Michael P. Harris
Hunting Methods of Gyrfalcons and Behavior of Their Prey (ptarmigan)
Clayton M. White and Robert B. Weeden
Eastern Phoebe in Utah
Roland H. Wauer
Notes on the Wren-thrush
Douglas H. Morse
Trumpeter Swan in Utah
James C. Bartonek