Contents
Large-billed Insectivorous Birds: a Precipitous Diversity Gradient
Thomas W. Schoener
Behavior and Population Ecology of the Burrowing Owl, Speotyto Cunicularia, in the Imperial Valley of California
Harry N. Coulombe
Springtime Movements of Transient Nocturnally Migrating Landbirds in the Gulf Coastal Bend Region of Texas
Bill J. Forsyth and Douglas James
Inter-populational Song Dialect Discrimination in the White-crowned Sparrow
Marilyn M. Milligan and Jared Verner
Body Temperatures of Petrels
John Warham
Nesting and Movements of Canada Geese on the Snake River in Washington
James Culbertson, Larry L. Cadwell, and Irven O. Buss
News and Notes
The Condor
Publications Received
The Condor
The Bulletin Board
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
Quaternary Avian Remains from Dark Canyon Cave, New Mexico
Hildecarde Howard
Notes on the Use of Desert Springs by Birds in California
Michael Smyth and Harry N. Coulombe
Exploitation of Nectar Resources by Hummingbirds, Bees (bombus), and Diglossa Baritula and Its Role in the Evolution of Penstemon Kunthii
David L. Lyon and Christine Chadek
An Early Pleistocene Eagle from Nebraska
Larry D. Martin
Further Notes on Costa Rican Birds
Robert W. Dickerman
Herring Gull Attacks Eared Grebe
James H. Hafft
Occurrence of the Xantus Murrelet Off the Oregon Coast
J. Michael Scott, John Butler, William G. Pearcy, and Gerard A. Bertrand
Nesting Record of European Skylark in Washington State
Terence R. Wahl and Howard E. Wilson