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The Condor, Volume 75, Number 2 (1973)

2 (April)


A New Race of Sumichrast's Wren From Chiapas, Mexico. 137-139.
Richard S. Crossin, Charles A. Ely.
Observations on the Breeding Adaptations of the Roadrunner. 140-149.
Robert D. Ohmart.
Ecological Distribution of Birds in the Kolomak River-Askinuk Mountain Region, Yukon-Kuskokwim Delta, Alaska. 150- 163.
Richard T. Holmes, Craig P. Black.
Variation in the Incidence of Hatching Failure in the Cedar Waxwing and Other Species. 164-169.
Stephen I. Rothstein.
Contact Zones and Hybridization in the Jamaican Hummingbird, Trochilus Polytmus (L.). 170-176.
Frank B. Gill, F. J. Stokes, C. Stokes.
Distribution of Two Western Clapper Rail Races as Determined By Responses to Taped Calls. 177-183.
Roy E. Tomlinson, Richard L. Todd.
Postnuptial Molt and Its Relation to Reproductive Cycle and Body Weight in Mountain White-Crowned Sparrows (Zonotrichia Leucophrys Oriantha) . 184-189.
Martin L. Morton, David E. Welton.
Growth Rate and Ontogeny of Thermoregulation in Nestling Great-Tailed Grackles, Cassidix Mexicanus Prosopidicola (Icteridae). 190-199.
Robert F. Gotie, James C. Kroll.
Notes on the Breeding Biology and Behavior of the Magnificent Frigatebird. 200-209.
A. W. Diamond.
Winter Ecology of Migrant and Resident Lewis' Woodpeckers in Southeastern Colorado. 210-224.
Harlo H. Hadow.
Seed Preferences and Digestive Efficiency of Cardinals and Song Sparrows. 225-234.
Mary F. Willson, Janet C. Harmeson.
The Bulletin Board. 255.
News and Notes. 256-257.
Summary of Cash Receipts and Disbursements and Changes in Fund Balances. 258.
Cooper Ornithological Society Statement of Assets and Fund Balances Resulting From Cash Transactions. 258.

Short Communications

The Effects of Weather and Ice Conditions on Breeding in Adelie Penguins. 235-239.
David G. Ainley, Robert E. Leresche.
Richardson's Zacatecas Collection, I. 239-241.
J. Dan Webster.
House Sparrows (Passer Domesticus) in the Amazon. 242-243.
Nicel J. H. Smith.
Fossil Birds From the Late Pleistocene Ingleside Fauna, San Patricio County, Texas. 243-244.
Alan Feduccia.
Techniques for Color-Marking Hummingbirds. 244-245.
F. Gary Stiles, Larry L. Wolf.
Cedar Waxwings in Central Alaska. 245-246.
Bryan L. Sage.
Observations on the Urban Feeding Habits of the Roadrunner (Geococcyx Californianus). 246.
Robert E. Wright.
Tongue Structure of the Plumed Whistling Duck (Dendrocygna Eytoni). 246-247.
M. Kent Rylander, Eric G. Bolen.
Two Records of White-Throated Sparrows (Zonotrichia Albicollis) in Alaska. 248.
Robert B. Weeden, Judith S. Weeden.
Record of a Robin Feeding Shrews to Its Nestlings. 248.
Leon R. Powers.
Distribution and Generic Placement of the Plain Tyrannulet (Inezia Inornata). 249-250.
Kenneth C. Parkes.
Unusual Mobbing Behavior By Incubating Pinon Jays. 251-252.
Russell P. Balda, Gary C. Bateman.
Confused Nocturnal Behavior of a Flock of Migrating Yellow Wagtails. 252-253.
Michael Cochfeld.
New Northern Record for Xantus Murrelet. 253.
Gerald A. Sanger.
Shell-Thinning in Eggs of the Ashy Petrel (Oceanodroma Homochroa) From the Farallon Islands. 254-255.
Malcolm C. Coulter, Robert W. Risebrough.
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Front Matter (PDF) (287.81 KB) 287.81 KB

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