Contents
Size Dimorphism and Food Habits of North American Owls
Caroline M. Earhart and Ned K. Johnson
The Water Economy of the Sage Sparrow, Amphispiza Belli Nevadensis
Ralph R. Moldenhauer and John A. Wiens
Quantitative and Organizational Features of the Avian Renal Medulla
Oscar W. Johnson and John N. Mugaas
A Redescription of Two Pliocene Cormorants
Nertram G. Murray Jr.
Taxonomy of the Common Meadowlark (sturnella Magna) in Central and Southern Mexico and Caribbean Central America
Robert W. Dickerman and Allan R. Phillips
A Second Hybrid Williamson's X Red-naped Sapsucker and an Evolutionary History of Sapsuckers
Lester L. Short and John J. Morony Jr.
The Secretary Rates and the Chemical Stimulus for Secretion of the Nasal Salt Glands in the Rallidae
Roger E. Carpenter and Mary A. Stafford
Effects of Spring Leaf-fall on Composition and Density of Breeding Birds in Two Southern Arizona Woodlands
Russell P. Balda
Temperature Regulation in the Little Papuan Frogmouth, Podargus Ocellatus
Robert C. Lasiewski, William R. Dawson, and George A. Bartholomew
The Seasonal Distribution of Some Seabirds Off Washington and Oregon, with Notes on Their Ecology and Behavior
Gerald A. Sanger
New and Notes
The Condor
Cooper Ornithological Society
The Condor
Membership Directory
The Condor
The Bulletin Board
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Short Communications
Food of Nesting Bald Eagles on San Juan Island, Washington
Laszlo Retfalvi
Bird Observations from Tierra Del Fuego
Allan R. Keith
Cactus Wrens Attack Ground Squirrel
E. Linwood Smith
Wattled Jacana Caught by an Anaconda
F. Haverschmidt
Notes on the Territoriality of Hammond's Flycatcher (empidonax Hammondi) in Western Montana
David A. Manuwal
Second Record of Ovenbird in Nevada
M. Dale Arvey
Northward Migration to Surinam of South American Martins (progne)
E. Eisenmann and F. Haverschmidt
The Fox Sparrow on the West Slope of the Oregon Cascades
Richard C. Banks
Apparent Lack of the Double-scratch in Two Species of Spizella
George A. Clark Jr.
Pseudo-sleeping Attitude in Lesser Scaup and Ring-necked Ducks
Daniel W. Anderson
Additional Records of Birds from British Honduras (belize)
Jon C. Barlow, James A. Dick, and Esther Pendercast
Sooty Tern Egg Predation by Ruddy Turnstones
Richard S. Crossin and Lawrence N. Huber
Winter Wing Molt in the Western Grebe
Fred C. Sibley
Peregrine Falcon Observed Feeding Far at Sea
Donovan R. Craddock and Robert D. Carlson
A Mexican Specimen of the Yellow-billed Loon
Joseph R. Jehl Jr.
Breeding of Free-living Trumpeter Swans in Northeastern Washington
J. E. Johns and C. W. Erickson