Contents
The Foraging Ecology of Parus Atricapillus and P. Rufescens in the Breeding Season, with Comparisons with Other Species of Parus
William A. Sturman
Oxygen Consumption and Respiratory Evaporation of the Emu and Rhea
Eugene C. Crawford Jr. and Robert C. Lasiewski
Morphological Homogeneity of a Population of Alaska Willow Ptarmigan
George C. West, Susan Savage, Laurence Irving, and Leonard J. Peyton
Respiratory and Heart Rates of Birds at Rest
William A. Calder
Maintenance Behavior of Lesser and Lawrence's
Ellen L. Coutlee
News and Notes
The Condor
The Bulletin Board
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Communications
A Distinctive Song Pattern in Gambel's White-crowned Sparrow
Leonard J. Peyton and Barbara B. Dewolfe
Anophthalmia in the American Robin
Andrew J. Berger and Deborah V. Howard
The Survival Rate of Juvenile Cactus Wrens
Robert E. Ricklefs
Mixed Wood Duck-tree Duck Clutch in Texas
Eric G. Bolen and Brian W. Cain
The High Frequency of Occurrence of the Vestigial Claw in Colinus Virginianus Virginianus
William G. George and Gary M. Brown
First Specimen Records of the Dunlin and the Snowy Plover in Idaho
Glenn R. Downing and Edson Fichter
The Occurrence of Certain Nonpasserine Birds in Southern Nevada
George T. Austin
Canada Warbler in California
James R. Northern
Records of Snowy Owls in California
Stanley W. Harris and Charles F. Yocom
A Second Report on the Basihyale in American Songbirds, with Remarks on the Status of Peucedramus
William G. George
Raptors and Other North American Migrants in Mexico
Robert F. Andrle
Ornithological Notes from Zacatecas, Mexico
J. Dean Webster
First Record of the Gyrfalcon in Idaho
J. David Ligon
Specimen of the Magnificent Frigatebird from New Mexico
Dale A. Zimmerman