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Treasurer's Report, The Condor Aug 1981

The Bulletin Board, The Condor Aug 1981

Visibility And Bias In Avian Foraging Data, Judith L. Wagner Aug 1981

Growth Of A Nestling Marbled Murrelet, Katherine V. Hirsch, Douglas A. Woodby, Lee B. Astheimer Aug 1981

Neighbor/Stranger Song Discrimination In White-Crowned Sparrows, Myron Charles Baker, Daniel B. Thompson, Gregory L. Sherman Aug 1981

First Record Of A Black-Legged Kittiwake In Idaho, John W. Connelly, Robert J. Gates Aug 1981

Front Matter (Pdf), The Condor May 1981

Back Matter (Pdf), The Condor May 1981

Differential Use Of Territorial Sites By Male Blue Grouse, Richard A. Lewis, Fred C. Zwickel May 1981

The Bulletin Board, The Condor May 1981

Microgeographic Variation In The Song Of The Sage Sparrow, Terrell Rich May 1981

Interspecific Allopreening Solicitation In Female Brewer's Blackbirds, Nicolaas A. Verbeek, Robert W. Butler, Howard Richardson May 1981

Estimation Of The Relative Protein Cost Of Reproduction In Birds, Charles T. Robbins May 1981

Bird Communities And Forest Structure In The Sierra Nevada Of California, Edward C. Beedy May 1981

Time-Budgets, Energy Needs And Kleptoparasitism In Breeding Lesser Sheathbills (Chionis Minor), Alan E. Burger May 1981

Feeding Ecology Of Marine Cormorants In Southwestern North America, David G. Ainley, Daniel W. Anderson, Paul R. Kelly May 1981

Cowbird Parasitism, Host Fitness, And Age Of The Host Female In An Island Song Sparrow Population, James N. M. Smith May 1981

Breeding Season Ecology And Behavior Of Ridgway's Hawk (Buteo Ridgwayi), James W. Wiley, Beth Nethery Wiley May 1981

Recent Publications, The Condor May 1981

Emigration Behavior Of Clark's Nutcracker, Stephen B. Wall, Stephen W. Hoffman, Wayne K. Potts May 1981

News And Notes, The Condor May 1981

Observations At A Twenty-Egg Killdeer Nest, John T. Mundahl, Oscar L. Johnson, Mark L. Johnson May 1981

First Records Of Black-Legged Seriema (Chunga Burmeisteri) In Bolivia, C. Gregory Schmitt, Donna C. Cole May 1981

Description Of The Nest And Eggs Of The Peruvian Thick-Knee (Burhinus Superciliaris), Morris D. Williams May 1981

Temporal Feeding Patterns Of Some Tropical Frugivores, Gail E. Kantak May 1981

Inheritance Of Color Phases Of Ferruginous Hawks, Sheila M. Schmutz, Josef K. Schmutz May 1981

Front Matter (Pdf), The Condor Feb 1981

Back Matter (Pdf), The Condor Feb 1981

Observations Of Feeding At Sea By A Peregrine Falcon And An Osprey, William Rogers, Stephen Leatherwood Feb 1981

News And Notes, The Condor Feb 1981