Contents
Hybridization in Birds
Frank B. Gill
Three Hybrid Zones Between Hermit and Townsend's Warblers in Washington and Oregon
Sievert Rohwer and Christopher Wood
Brood Survival and Recruitment of Mallards in Relation to Wetland Density and Hatching Date
Elston H. Dzus and Robert G. Clark
Do Seeds Hinder Digestive Processing of Fruit Pulp? Implications for Plant/frugivore Mutualisms
Mark C. Witmer
Ecological Factors Affecting Group and Territory Size in White-throated Magpie-jays
Tom A. Langen and Sandra L. Vehrencamp
Effects of Clutch Size and Timing of Breeding on Reproductive Success of Greater Rheas
Gustavo J. Fernandez and Juan C. Reboreda
Postfledging Dispersal, Habitat Use, and Home-range Size of Juvenile Wood Thrushes
Angela D. Anders, John Faaborg, and Frank R. Thompson III
A Glycoalkaloid in Ripe Fruit Deters Consumption by Cedar Waxwings
Douglas J. Levey and Martin L. Cipollini
Blackfly-induced Mortality of Nestling Red-tailed Hawks
Roger N. Smith, Steven L. Cain, Stanley H. Anderson, Jeffrey R. Dunk, and Elizabeth S. Williams
Effects of Habitat and Invertebrate Density on Abundance and Foraging Behavior of Brown-headed Cowbirds
Dana L. Morris and Frank R. Thompson III
Short-range and Long-range Songs: Use of Two Acoustically Distinct Song Classes by Dark-eyed Juncos
Russell C. Titus
Molecular Systematics of the Scaled Quail Complex (genus Callipepla)
Robert M. Zink and Rachelle C. Blackwell
Abiotic Factors as Predictors of Distribution in Southern African Bulbuls
Penn Lloyd and Antony R. Palmer
Systematic Relationships among the Emberizid Sparrows
Michael A. Patten and Michael Fugate
Responses of Avian Assemblages to a Natural Edge in a Chaco Semiarid Forest in Argentina
Javier Lopez De Casenave, Juan Pablo Pelotto, Sandra M. Caziani, Myriam Mermoz, and Jorge Protomastro
Ecological Significance of Brood-site Fidelity in Black Brant: Spatial, Annual, and Age-related Variation
Mark S. Lindberg and James S. Sedinger
Red-cockaded Woodpecker Nest-cavity Selection: Relationships with Cavity Age and Resin Production
Richard N. Conner, Daniel Saenz, D. Craig Rudolph, William G. Ross, and David L. Kulhavy
Evolution of Nest-building Behavior in Agapornis Parrots
Jessica R. Eberhard
In Memoriam: Roger Tory Peterson, 1908-1996
Susan Roney Drennan
In Memoriam: Helmut Sick, 1910-1991
Francois Vuilleumier
100 Years Ago in the Auk
The Auk
Covers
Front Matter
The Auk
Back Matter
The Auk
Short Communications
Ecological Neighborhoods in Red-cockaded Woodpecker Populations
R. Todd Engstrom and Grzegorz Mikusinski
What is the Function of First Eggs in Crested Penguins?
Colleen Cassady St. Clair
Natal Philopatry and Close Inbreeding in Cory's Shearwater (calonectris Diomedea)
Corinne Rabouam, Jean-Claude Thibault, and Vincent Bretagnolle
Chipmunks Use Leverage to Eat Oversized Eggs: Support for the Use of Quail Eggs in Artificial Nest Studies
David P. Craig
Chick Recognition in American Avocets: a Chick-exchange Study
Szabolcs Lengyel, Julie A. Robinson, and Lewis W. Oring
Implications of Frequent Habitat Switches in Foraging Bar-tailed Godwits
Brian J. Mccaffery
Frequency of Extrapair Young Increases in Second Broods of Eastern Phoebes
Kelvin F. Conrad, Raleigh J. Robertson, and Peter T. Boag
An Application of O'connor's Brood-reduction Model
Melinda S. Labranche
Reproductive Success of Belding's Savannah Sparrows in a Highly Fragmented Landscape
Abby N. Powell and Christine L. Collier
Response of Eastern Willets (catoptrophorus S Semipalmatus) to Vocalizations of Eastern and Western (c S Inornatus) Willets
Hector D. Douglas III
Wife-sharing" in the Tasmanian Native Hen (gallinula Mortierii): is It Caused by a Male-biased Sex Ratio?"
Anne W. Goldizen, Alan R. Goldizen, David A. Putland, David M. Lambert, Craig D. Millar, and Jason C. Buchan
A New Intrageneric Dendroica Hybrid from Hispaniola
Steven C. Latta and Kenneth C. Wunderle Jr.
Allozymic and Morphometric Comparisons among Indigo and Lazuli Buntings and Their Hybrids
Myron C. Baker and Michael S. Johnson
Erratum: Weathers (1997)
Wesley W. Weathers