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Notes On The Behavior And Ecology Of The Red-Cotingas (Cotingidae: Phoenicircus), Pepper W. Trail, Paul Donahue Dec 1991

Sibling Species Of Greenlets (Vireonidae) In Southern Brazil, Edwin O. Willis Dec 1991

Time Budgets And The Adaptiveness Of Polyandry In Northern Jacanas, Burr J. Betts, Donald A. Jenni Dec 1991

Time-Activity Budget Of Wilson's And Semipalmated Plovers In A Tropical Environment, Alain Morrier, Raymond Mcneil Dec 1991

Migration And Mass Change Of White-Rumped Sandpipers In North And South America, B. A. Harrington, F. J. Leeuwenberg, S. Lara Resende, R. Mcneil, B. T. Thomas, J. S. Grear Dec 1991

Seasonality, Habitat Use, And Flock Sizes Of Shorebirds At The Bahia De Asuncion, Paraguay, Floyd E. Hayes, Jennifer A. Fox Dec 1991

Copulatory And Other Pre-Incubation Behaviors Of Cooper's Hawks, Robert N. Rosenfield, John Bielefeldt, John Cary Dec 1991

The Voice And First Nesting Records Of The Zigzag Heron In Ecuador, Peter English, Cynthia Bodenhorst Dec 1991

Enhanced Fledging Success By Colonially Nesting Ospreys In Nova Scotia Coastal Habitat, Stephen P. Flemming, Robert P. Bancroft, Norman R. Seymour Dec 1991

Fruit Harvesting By American Robins: Influence Of Fruit Size, Douglas W. White, Edmund W. Stiles Dec 1991

Foraging Behavior Of A Guild Of Neotropical Vultures, William C. Lemon Dec 1991

Ovarian Follicles Do Not Reveal Laying Histories Of Post-Incubation Wood Ducks, Brad Semel, Paul Sherman Dec 1991

A Note On The Vocalizations Of The Chinese Nuthatch, Erik Matthysen, Sandra L. L. Gaunt, D. Archibald Mccallum Dec 1991

Vocal Responsiveness To Chilling In Embryonic And Neonatal American Coots, Shawn C. Bugden, Roger M. Evans Dec 1991

House Sparrows Open An Automatic Door, Randall Breitwisch, Margaret Breitwisch Dec 1991

Proceedings Of The Seventy-Second Annual Meeting, John L. Zimmerman Dec 1991

Repeatability Of Clutch Size In House Wrens, E. Dale Kennedy, Douglas W. White Dec 1991

Comparison Of Nesting Habitat Of Coexisting Sharp-Shinned And Cooper's Hawks In Missouri, Ernie P. Wiggers, Kevin J. Kritz Dec 1991

Specimens And Probable Breeding Activity Of The Band-Rumped Storm-Petrel On Hawaii, Winston E. Banko, Paul C. Banko, Reginald E. David Dec 1991

Effects Of Leafing And Position On Nest Predation In A Mediterranean Fragmented Forest, T. Santos, J. L. Telleria Dec 1991

Pairbond Formation In The Razorbill, Richard H. Wagner Dec 1991

Discovery Of The Masked Saltator In Colombia, With Notes On Its Ecology And Behavior, Luis Miguel Renjifo Dec 1991

Bird/Ant/Acacia Symbioses In A Mature Neotropical Forest, James D. Gilardi, Kirsten Von Kugelgen Dec 1991

Successful Exchange Of Prairie-Chicken Eggs Between Nests In Two Remnant Populations, Ronald L. Westemeier, Scott A. Simpson, David A. Cooper Dec 1991

Distribution And Population Status Of Harlequin Ducks In Idaho, E. Frances Cassirer, Craig R. Groves, Richard L. Wallen Dec 1991

Back Matter (Pdf), Wilson Bulletin Dec 1991

Front Matter (Pdf), Wilson Bulletin Dec 1991

Occurrence Of The Andean Condor In The Perija Mountains Of Venezuela, Rosanna Calchi, Angel L. Viloria Dec 1991

Population Dynamics Of Blue Jays At A Bird Feeder, Margaret B. Hickey, Margaret Clark Brittingham Sep 1991

Ornithological Literature, Wilson Bulletin Sep 1991