Contents
Time-budgets, Energy Needs and Kleptoparasitism in Breeding Lesser Sheathbills (chionis Minor)
Alan E. Burger
Feeding Ecology of Marine Cormorants in Southwestern North America
David G. Ainley, Daniel W. Anderson, and Paul R. Kelly
Breeding Season Ecology and Behavior of Ridgway's Hawk (buteo Ridgwayi)
James W. Wiley and Beth Nethery Wiley
Cowbird Parasitism, Host Fitness, and Age of the Host Female in an Island Song Sparrow Population
James N. M. Smith
Emigration Behavior of Clark's Nutcracker
Stephen B. Wall, Stephen W. Hoffman, and Wayne K. Potts
Recent Publications
The Condor
Differential Use of Territorial Sites by Male Blue Grouse
Richard A. Lewis and Fred C. Zwickel
News and Notes
The Condor
The Bulletin Board
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Short Communications
Estimation of the Relative Protein Cost of Reproduction in Birds
Charles T. Robbins
Interspecific Allopreening Solicitation in Female Brewer's Blackbirds
Nicolaas A. Verbeek, Robert W. Butler, and Howard Richardson
Observations at a Twenty-egg Killdeer Nest
John T. Mundahl, Oscar L. Johnson, and Mark L. Johnson
First Records of Black-legged Seriema (chunga Burmeisteri) in Bolivia
C. Gregory Schmitt and Donna C. Cole
Description of the Nest and Eggs of the Peruvian Thick-knee (burhinus Superciliaris)
Morris D. Williams
Temporal Feeding Patterns of Some Tropical Frugivores
Gail E. Kantak
Inheritance of Color Phases of Ferruginous Hawks
Sheila M. Schmutz and Josef K. Schmutz