Contents
Color Preferences of Frugivorous Birds in Relation to the Colors of Fleshy Fruits
Mary F. Willson, Daniel A. Graff, and Christopher J. Whelan
Gas Pressures in the Air Cell of the Ostrich Egg Prior to Pipping as Related to Oxygen Consumption Eggshell Gas Conductance, and Egg Temperature
Moshe Meir and Amos Ar
An Introduction to the Use of Geographic Information Systems for Ornithological Research
Denice M. Shaw and Samuel F. Atkinson
Sexual Differences in Flight Calls and the Cue for Vocal Sex Recognition of Swinhoe's Storm-petrels
Miki Taoka and Hiroshi Okumura
Nesting Behavior of Sunbitterns (eurypyga Helias)
Betsy Trent Thomas and Stuart D. Strahl
Diving Behavior of Adelie Penguins Determined by Time-depth Recorder
Yasuhiko Naito, Tomohiro Asaga, and Yoshikuni Ohyama
Embryonic Development and Nest Attentiveness of Wood Ducks during Egg Laying
Robert A. Kennamer, William F. IV, and Gary R. Hepp
Beta-phocacholic Acid in Bile; Biochemical Evidence that the Flamingo is Related to an Ancient Goose
L. R. Hagey, C. D. Schteingart, H-T. Ton-Nu, S. S. Rossi, D. Odell, and A. F. Hofmann
Changes in Body Composition of American Black Ducks Wintering at Chincoteague, Virginia
John M. Morton, Roy L. Kirkpatrick, and Michael R. Vaughan
Hummingbird Sweetness Preferences: Taste or Viscosity?
Mark R. Stromberg and Peter B. Johnsen
Endocrine Response of Captive Male Brown-headed Cowbirds to Intrasexual Social Cues
Alfred M. Dufty and John C. Wingfield
Economics of Caching Versus Immediate Consumption by White-breasted Nuthatches: the Effect of Handling Time
Mark S. Woodrey
Heritability of Muscle Size in Eastern Kingbirds
Mary C. Mckitrick
Evolutionary Morphology of Flightlessness in the Auckland Islands Teal
Bradley C. Livezey
Effects of Predation and Competitor Interference on Nesting Success of House Wrens and Tree Swallows
Deborah M. Finch
Nest-site Habitat Selected by Merlins in Southeastern Montana
Carolyn Hull Sieg and Dale M. Becker
Differential Predation on Eggs in Clutches of Northwestern Crows: the Importance of Egg Color
Nicolaas A. Verbeek
Genetic Evidence of Mixed Reproductive Strategy in a Monogamous Bird
Stephanie C. Petter, Donald B. Miles, and Matthew M. White
The Importance of Subarctic Intertidal Habitats to Shorebirds: a Study of the Central Yukon-kuskokwim Delta, Alaska
Robert E. Gill Jr. and Colleen M. Handel
Influence of Parental Experience on the Growth of Wandering Albatross Chicks
Benoit Lequette and Henri Weimerskirch
Growth Patterns of Two Races of California Gull Raised in a Common Environment
Joseph R. Jehlm Jr., Jon Francine, and Suzanne I. Bond
Summer Habitat Ecology of Northern Spotted Owls in Northwestern California
David M. Solis Jr. and R. J. Gutierrez
An Intergeneric Hybrid Hummingbird (heliodoxa Leadbeateri X Heliangelus Amethysticollis) from Northern Colombia
Gary R. Graves and Richard L. Zusi
Water-vapor Pressure in Nests of the San Miguel Island Song Sparrow
Michael D. Kern, Mark K. Sogge, and Charles Van Iii
Book Reviews
Marcy F. Lawton
News and Notes
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Commentary
Dispersal Terminology: Changing Definitions in Midflight?
Ian G. Warkentin and Paul C. James
Natal Dispersal: Greenwood (1980) Revisited
James R. Belthoff and Gary Ritchison
Short Communications
Concentrations of Seabirds at Oil-drilling Rigs
Pat Herron Baird
Egg Size and Laying Order of Snowy Egrets, Great Egrets, and Black-crowned Night-herons
Thomas W. Custer and Peter C. Frederick
Infanticide in the Eurasian Dipper
Sonja I. Yoerg
Estimated Size of Black-capped Vireo Population in Northern Coahuila, Mexico
Robert H. Benson and Karen L. Benson
An Observation of Social Play in Bearded Vultures
Daniel T. Blumstein
A Foraging Association Between Two Kite Species (ictinea Plumbea and Leptodon Cayanensis) and Buffy-headed Marmosets (callithrix Flaviceps) in Southeastern Brazil
Stephen F. Farrari
Survival of Breeders in Santa Cruz Island and Mainland California Scrub Jay Populations
Jonathan L. Atwood, Mary Jo Elpers, and Charles T. Collins
Red-bellied Woodpecker Predation on Nestling House Wrens
Andrew J. Neill and R. Given Harper
Eggshell Conductance and Other Physical Characteristics of Avian Eggs Laid in the Peruvian Andes
Cynthia Carey, Fabiola Leon-Velarde, and Carlos Monge
Annual Changes in Gizzard Size and Function in a Frugivorous Bird
Glenn E. Walsberg and Christopher W. Thompson
Communal Roosting in a Very Small Bird: Consequences for the Thermal and Respiratory Gas Environments
Glenn E. Walsberg
Carotenoids Produce Flush in the Elegant Tern Plumage
Jocelyn Hudon and Alan H. Brush