Contents
How Birds Develop Song Dialects
Robert E. Lemon
Song Dialects and Colonization in the House Finch, Carpodacus Mexicanus, on the East Coast
Paul Mundinger
Model Estimation of Energy Flow in Oregon Coastal Seabird Populations
John A. Wiens and J. Michael Scott
The Relation of Foliage Complexity to Ecological Diversity of Three Amazonian Bird Communities
David L. Pearson
Flow of Digesta in the Intestine and Cecum of the Rock Ptarmigan
William C. Gasaway, Dan F. Holleman, and Robert G. White
News and Notes
The Condor
Selected Recent Publications
The Condor
The Bulletin Board
The Condor
Index to Volume 77
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Short Communications
Heat Loss from Ducks Feet Immersed in Cold Water
Delbert L. Kilgore Jr. and Knut Schmidt-Nielsen
Inverted Flight in Canada Geese
Frank H. Heppner and Christopher Willard
Three Adult Red-tailed Hawks Tending a Nest
James W. Wiley
Extra Adults at Harris Hawk Nests
William J. Mader
Hunting Tactics of a Peregrine Falcon on Black Turnstones
R. Wayne Campbell
Plumage Variation in the Masked Bobwhite
Richard C. Banks
Observations on Roof-nesting Killdeers
Salome Ross Demaree
Role of the Chick's Begging Behavior in the Regulation of Parental Feeding Behavior of Larus Glaucescens
Bryan A. Henderson
Effects of Human Activity on Egg and Chick Mortality in a Glaucous-winged Gull Colony
William Humphrey Gillett, James L. Hayward Jr., and John F. Stout
Egg Size of Murrelets
Spencer G. Sealy
Shadows and Detection of Movement by a Burrowing Owl (speotyto Cunicularia)
Donald H. Owings and Earl Handa
Daily Temperature Cycles in Barred, Great-horned and Snowy Owls
W. R. Siegfried, R. L. Abraham, and V. B. Kuechle
Incubation Patch Fluctuations in Red-winged Blackbirds
Larry C. Holcomb
Indigo Buntings in Utah with Special Reference to Inter-specific Competition with Lazuli Buntings
Robert C. Whitmore
Evidence of an Incomplete Prealternate Molt in Some South American Myiarchus Flycatchers
Wesley E. Lanyon
First Observation of the Orange-breasted Falcon in the Yucatan Peninsula of Mexico
John William Hardy, Ralph J. Raitt, Jorge Orejuela, Thomas Webber, and Bruce Edinger
Observations at a Nest of the Black-and-white Hawk-eagle
Joseph G. Strauch Jr.
The Evolutionary Reappearance of Ancestral Muscles as Developmental Anomalies in Two Species of Birds
Robert J. Raikow
Common Raven and Starling Reliance on Sentinel Common Crows
Richard N. Conner, Irvine D. Prather, and Curtis S. Adkisson