Contents
Social Behavior of Nesting Brewer's Blackbirds
Henry S. Horn
Song in a Population of Black-throated Sparrows
Donald B. Heckenlively
An Integeneric Hybrid Flycatcher (tyrannus X Muscivora)
L. Irby Davis and Fred S. Webster Jr.
A Comparative Electrophoretic Study of Avian Plasma Proteins
Charles G. Sibley and Herbert T. Henderson
The Metabolic Significance of Differential Absorption of Radiant Energy by Black and White Birds
Frank Heppner
Energy Requirements for Existence in Relation to Size of Bird
S. Charles Kendeigh
Hyperphagia, Polydipsia, and Other Effects of Hypothalamic Lesions in the White-throated Sparrow, Zonotrichia Albicollis
Wayne J. Kuenzel and Carl W. Helms
The Biology of an Endangered Species, the Dark-rumped Petrel (pterodroma Phaeopygia), in the Galapagos Islands
Michael P. Harris
A Summary of Intergeneric New World Quail Hybrids, and a New Intergeneric Hybrid Combination
Paul A. Johnscard
Notes on the Cayenne Tern in Uruguay
Rodolfo Escalante
A Systematic Revision of Geothlypis Speciosa, the Black-polled Yellowthroat
Robert W. Dickerman
News and Notes
The Condor
The Bulletin Board
The Condor
Publications Received
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Short Communications
Ineffectiveness of Pineal Lesions on the Testis Cycle of a Finch
W. M. Hamner and R. J. Barfield
Photorefractoriness in Pinealectomized Harris Sparrows
Richard S. Donham and Fred E. Wilson
Birds of the Chignik River Drainage, Alaska
David W. Narver
New and Interesting Records from the Chiriqui Highlands of Panama
Charles F. Leck and Steven Hilty
Notes on Brazilian Cracidae
Helmut Sick
Common Teal and Tufted Duck in Northwestern California
Stanley W. Harris and R. H. Gerstenberg
The Great Swallow-tailed Swift (panyptila Santihieronymi) from the State of Guerrero, Mexico
Helmut Sick
Bird Records from Southern Nevada
Richard C. Banks and Charles G. Hansen
Birds Observed during a Cruise in the Ice-covered Bering Sea in March 1968
Laurence Irving, C. Peter Mcroy, and John J. Burns
Aerial Eagle Count in Colorado
James H. Enderson, Frank A. Colley, and John Stevenson
A California Specimen of the Bar-tailed Godwit
R. H. Gerstenberg and Stanley W. Harris
Observations on Food, Nesting, and Winter Populations of Large North American Falcons
Clayton M. White and David G. Roseneau
House Finches (carpodacus Mexicanus) in Montana
Ralph L. Hand
A Method of Estimating Carcass Fat and Fat-free Weights in Migrant Birds from Water Content of Specimens
George I. Child and Shirley G. Marshall
A Breeding Record for the Gray-hooded Gull, Larus Cirrocepahlus, on the Peruvian Coast
Humberto Tovar S. and N. Philip Ashmole