Contents
Temperature Regulation in Nestling Cactus Wrens: the Development of Homeothermy
Robert E. Ricklefs and F. Reed Hainsworth
Studies of the Behavior of Lunulated and Salvin's Antbirds
Edwin O. Willis
Chlorinated Hydrocarbon Residues in Peregrines and Their Prey Species from Northern Canada
James H. Enderson and Daniel D. Berger
Nest-related Activities of Black-billed Magpies
Michael J. Erpino
A New Race of the Purple Martin from Utah
William H. Behle
Peregrines and Pesticides in Alaska
Tom J. Cade, Clayton M. White, and John R. Haugh
News and Notes
The Condor
Publications Received
The Condor
The Bulletin Board
The Condor
Pictorial Checklist of Colorado Birds
Alfred M. Bailey and Robert J. Niedrach
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Communications
Distributional Records from Cerro Campana, Panama, with Notes on a Nesting of the Quail-dove, Geotrygon Lawrencii
Storrs L. Olson, George V. Powell, and Eugene Eisenmann
Notes on the Nesting of the Short-tailed Pigmy-tyrant (myiornis Ecaudatus) in Northeastern Venezuela
Raymond Mcneil and Aida Martinez
Synchronous Wing and Tail Molt in Diving Petrels
George E. Watson
Horned Lark and Black-billed Magpie from the Pleistocene of Nebraska
James Tate Martin
Changing Status of the Bronzed Cowbird in Arizona
R. Roy Johnson and Bernard Roer
Incubation at Low Temperatures by the Zebra Finch
Virginia Ehl Burley
Predation by Catbirds on Dragonflies
Allen M. Young
Heart Size and Altitude in Ptarmigan
Richard E. Johnson and F. Russell Lockner
A Winter Record of the Trumpeter Swan in Western Washington
Gordon D. Alcorn
Noteworthy Records of Vireos in California
R. Guy Mccaskie
Notes on the Status of the Tufted Duck (aythya Fuligula) in North America with a Report of a New Observation from Wyoming
Michael Gochfeld
Observations on Food-caching by an Adult Female Sparrow Hawk
Rey Stendell and Lee Waian
Hybrid of Blue-winged Teal Shoveller in Northwestern California
Frank A. Hall and Stanley W. Harris