Contents
Digestive Efficiency and Rate of Food Passage in Oilbird Nestlings
Carlos Bosque and Orenella De Parra
Giant Cowbird Eggs in the Nests of Two Icterid Hosts: the Use of Morphology and Electrophoretic Variants to Identify Individuals and Species
Robert C. Fleischer and Neal G. Smith
Egg-eating by Female Brown-headed Cowbirds
David M. Scott, Patrick J. Weatherhead, and C. Davison Ankney
Fecundity and Egg-laying Patterns of Captive Yearling Brown-headed Cowbirds
Nadine H. Jackson and Daniel D. Roby
The Frequency of Conspecific Brood Parasitism and the Pattern of Laying Determinancy in Yellow-headed Blackbirds
Bruce E. Lyon, Linda D. Hamilton, and Michael Magrath
Intracolony Variability during Periods of Poor Reproductive Performance at a Glaucous-winged Gull Colony
Edward C. Murphy, A. Anne Hoover-Miller, Robert H. Day, and Karen L. Oakley
The Status of North American Migrants in Central Amazonian Brazil
Douglas F. Stotz, R. O. Bierregaard, Mario Cohn-Haft, Peter Petermann, Jan Smith, Andrew Whittaker, and Summer V. Wilson
The Influence of Spring Snow Depth on White-tailed Ptarmigan Breeding Success in the Sierra Nevada
Jennifer A. Clarke and Richard E. Johnson
Population Dynamics of the New Zealand Whitehead (pachycephalidae) -- a Communal Breeder
B. J. Gill and Ian G. Mclean
Annual Variation in Return Rate, Mate and Nest-site Fidelity in Breeding Gentoo and Macaroni Penguins
T. D. Williams and S. Rodwell
Morphometric Comparison of Skeletons of the Western Grebe Complex Aechmophorus of the United States and Canada
Bradley C. Livezey and Robert W. Storer
Song Characteristics and Variation in a Population of Bananaquits on Puerto Rico
Joseph M. Wunderle Jr., Rafael A. Cortes, and William Carromero
Kleptoparasitic Behavior of the Magnificent Frigatebird: Sex Bias and Success
J. L. Osorno, R. Torres, and C. Macias Garcia
Roosts of Northern Saw-whet Owls in Southern Wisconsin
Scott R. Swengel and Ann B. Swengel
Diet of Northern Saw-whet Owls in Southern Wisconsin
Scott R. Swengel and Ann B. Swengel
Differential Responses of Tropical Roseate Terns to Aerial Intruders throughout the Nesting Cycle
David A. Shealer and Joanna Burger
Describing Willow Flycatcher Habitats: Scale Perspectives and Gender Differences
James A. Sedgwick and Fritz L. Knoff
An Experimental Study of Nest-site Selection by Yellow Warblers
Fritz L. Knopf and James A. Sedgwick
Hunting Ranges and Habitat Use and Selection of Urban-breeding Merlins
Navjot S. Sodhi and Lynn W. Oliphant
Male Incubation in Barn Swallows: the Influence of Nest Temperature and Sexual Selection
Henrik G. Smith and Robert Montgomerie
The Phylogenetic Relationship of the Margarornis Assemblage (furnariidae)
David Wyss Rudge and Robert J. Raikow
Book Reviews
Raymond Pierotti
News and Notes
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Short Communications
Urban-nesting of Swainson's Hawks in Saskatchewan
Paul C. James
Nest Dispersion in the Red-winged Blackbird
Ken Yasukawa, Rebecca A. Boley, Judy L. Mcclure, and Juliann Zanocco
Nesting Failure of the Wood Stork in a Neotropical Wetland
Cristina Ramo and Benjamin Busto
Relative Frequency Parameters and Song Recognition in Black-capped Chickadees
S. A. Shackleton, L. Ratcliffe, and D. M. Weary
Songs of Two Mexican Populations of the Western Flycatcher Empidonax Difficilis Complex
Steve N. Howell and Richard J. Cannings
The Influence of Group Size on Vigilance in Captive-raised Ring-necked Pheasants
Barry N. Milligan and R. Mark Brigham
Age of First Pairing and Breeding among Greenland White-fronted Geese
Stephanie M. Warren, A. D. Fox, Alyn Walsh, and Paddy O'Sullivan