Contents
The Adaptive Basis of Geographic Variation in Color of the Purple Martin
Richard F. Johnston
Airplane-albatross Collisions on Midway Atoll
Harvey I. Fisher
Water Requirements of the Ground Dove
Ernest J. Willoughby
Late Breeding on the Tres Marias Islands
P. R. Grant
Evaporative Cooling in the Poor-will and the Tawny Frogmouth
Robert C. Lasiewski and George A. Bartholomew
Avian Plumages and Molts
Dean Amadon
Status of the White Pelican in the United States and Canada through 1964
Michael F. Lies and William H. Behle
The Thigh Musculature of Three Species of Scolopacidae
Theodore H. Fleming
News and Notes
The Condor
Birds of Colorado
Alfred M. Bailey and Richard J. Niedrich
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Communications
The Boreal Owl as a Pleistocene Relict in Colorado
Paul H. Baldwin and James R. Koplin
Curlew Sandpiper in Ontario
Robert F. Andrie and Harold H. Axtell
An Unusually Long Incubation Period of the Mallard
Richard J. Wheeler
Range Extensions and Additional Notes on the Birds of Alaska's Arctic Slope
George C. West and Clayton M. White
Survival in the Wild of Hand-reared Passerine Birds
Andrew J. Berger
New and Unusual Bird Records from Utah
C. Lynn Hayward
Cedar Waxwing Nesting in Southern California
Eleanor A. Pugh
Nesting Activities of Black-backed Woodpeckers
Lawrence Kitham