Contents
A New Race of Sumichrast's Wren from Chiapas, Mexico
Richard S. Crossin and Charles A. Ely
Observations on the Breeding Adaptations of the Roadrunner
Robert D. Ohmart
Ecological Distribution of Birds in the Kolomak River-askinuk Mountain Region, Yukon-kuskokwim Delta, Alaska
Richard T. Holmes and Craig P. Black
Variation in the Incidence of Hatching Failure in the Cedar Waxwing and Other Species
Stephen I. Rothstein
Contact Zones and Hybridization in the Jamaican Hummingbird, Trochilus Polytmus (l.)
Frank B. Gill, F. J. Stokes, and C. Stokes
Distribution of Two Western Clapper Rail Races as Determined by Responses to Taped Calls
Roy E. Tomlinson and Richard L. Todd
Postnuptial Molt and Its Relation to Reproductive Cycle and Body Weight in Mountain White-crowned Sparrows (zonotrichia Leucophrys Oriantha)
Martin L. Morton and David E. Welton
Growth Rate and Ontogeny of Thermoregulation in Nestling Great-tailed Grackles, Cassidix Mexicanus Prosopidicola (icteridae)
Robert F. Gotie and James C. Kroll
Seed Preferences and Digestive Efficiency of Cardinals and Song Sparrows
Mary F. Willson and Janet C. Harmeson
The Bulletin Board
The Condor
News and Notes
The Condor
Cooper Ornithological Society Statement of Assets and Fund Balances Resulting from Cash Transactions
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Short Communications
The Effects of Weather and Ice Conditions on Breeding in Adelie Penguins
David G. Ainley and Robert E. Leresche
Richardson's Zacatecas Collection, I
J. Dan Webster
House Sparrows (passer Domesticus) in the Amazon
Nicel J. Smith
Techniques for Color-marking Hummingbirds
F. Gary Stiles and Larry L. Wolf
Cedar Waxwings in Central Alaska
Bryan L. Sage
Observations on the Urban Feeding Habits of the Roadrunner (geococcyx Californianus)
Robert E. Wright
Tongue Structure of the Plumed Whistling Duck (dendrocygna Eytoni)
M. Kent Rylander and Eric G. Bolen
Two Records of White-throated Sparrows (zonotrichia Albicollis) in Alaska
Robert B. Weeden and Judith S. Weeden
Record of a Robin Feeding Shrews to Its Nestlings
Leon R. Powers
Unusual Mobbing Behavior by Incubating Pinon Jays
Russell P. Balda and Gary C. Bateman
New Northern Record for Xantus Murrelet
Gerald A. Sanger
Shell-thinning in Eggs of the Ashy Petrel (oceanodroma Homochroa) from the Farallon Islands
Malcolm C. Coulter and Robert W. Risebrough