THE CONDOR
Volume 106, Number 1
February 2004 C.E.
Table of Contents

SPECIAL SECTION: CAVITY NESTERS AND KEYSTONE PROCESSES
 
Emerging Concepts and Research Directions in the Study of Cavity-Nesting Birds: Keystone Ecological Processes
1
  JAMES C. BEDNARZ, DANA RIPPER AND PAUL M. RADLEY
Nest-sites and Nest Webs for Cavity-Nesting Communities in Interior British Columbia, Canada: Nest Characteristics and Niche Partitioning
5
  KATHY MARTIN, KATHRYN E. H. AITKEN AND KAREN L. WIEBE
Modeling Occupancy of Nest Cavities in Recently Burned Forests
20
  VICTORIA A. SAAB, JONATHAN DUDLEY AND WILLIAM L. THOMPSON
Ecological Relationships between Fungi and Woodpecker Cavity Sites
37
  JEROME A. JACKSON AND BETTE J. S. JACKSON
The Role of Foraging Woodpeckers in the Decomposition of Ponderosa Pine Snags
50
  KERRY L. FARRIS, MARTIN J. HUSS AND STEVE ZACK

FEATURE ARTICLES
Declines in Wintering Populations of Red Knots in Southern South America
60
  R. I. GUY MORRISON, R. KENYON ROSS AND LAWRENCE J. NILES
An Experimental Field Study of the Function of Crested Auklet Feather Odor
71
  IAN L. JONES, JULIE C. HAGELIN, HEATHER L. MAJOR AND L. E. L. RASMUSSEN
Winter Ecology of Spectacled Eiders: Environmental Characteristics and Population Change
79
  MARGARET R. PETERSEN AND DAVID C. DOUGLAS
Feeding Behavior of Four Arboreal Darwin's Finches: Adaptations to Spatial and Seasonal Variability
95
  SABINE TEBBICH, MICHAEL TABORSKY, BIRGIT FESSL, MICHAEL DVORAK AND HANS WINKLER
Diets of Insectivorous Birds along the Colorado River in Grand Canyon, Arizona
106
  HELEN K. YARD, CHARLES VAN RIPER III AND BRYAN T. BROWN
Avian Nest Success in Midwestern Forests Fragmented by Agriculture
116
  MELINDA G. KNUTSON, GERALD J. NIEMI, WESLEY E. NEWTON AND MARY A. FRIBERG
Reproductive Effort and Return Rates in the Mountain White-crowned Sparrow
131
  MARTIN L. MORTON, MARIA E. PEREYRA, JOHN D. CRANDALL, ELIZABETH A. MACDOUGALL-SHACKLETON AND THOMAS P. HAHN

SHORT COMMUNICATIONS
Bacteria in the Crop of the Seed-Eating Green-rumped Parrotlet
139
  M. ANDREÍNA PACHECO, M. ALEXANDRA GARCIA-AMADO, CARLOS BOSQUE AND MARÍA G. DOMINGUEZ-BELLO
Rest-Phase Thermoregulation in Free-Ranging White-backed Mousebirds
143
  ANDREW E. MCKECHNIE, GERHARD KÖRTNER AND BARRY G. LOVEGROVE
Low Frequency of Extra-Pair Paternity and High Frequency of Adoption in Black-legged Kittiwakes
149
  FABRICE HELFENSTEIN, CLAIRE TIRARD, ETIENNE DANCHIN AND RICHARD H. WAGNER
Bimodal Signaling of a Sexually Selected Trait: Gular Pouch Drumming in the Magnificent Frigatebird
156
  VINNI MADSEN, THORSTEN J. S. BALSBY, TORBEN DABELSTEEN AND JOSÉ LUIS OSORNO
Discrete Variants of Evening Grosbeak Flight Calls
161
  KENDRA SEWALL, RODD KELSEY AND THOMAS P. HAHN
Loss of Habitat Connectivity Hinders Pair Formation and Juvenile Dispersal of Chucao Tapaculos in Chilean Rainforest
166
  MARY F. WILLSON
Food Deliveries at Swallow-tailed Kite Nests in Southern Florida
171
  KENNETH D. MEYER, STEVEN M. MCGEHEE AND MICHAEL W. COLLOPY
Food Delivered to Nests of Swallow-tailed Kites in Tikal National Park, Guatemala
177
  RICHARD P. GERHARDT, DAWN M. GERHARDT AND MIGUEL ANGEL VÁSQUEZ
Early Onset of Incubation by Wood Ducks
182
  GARY R. HEPP

COMMENTARY
 
The Problem of Molt and Plumage Homologies and the First Plumage Cycle
187
  LUKAS JENNI AND RAFFAEL WINKLER
Molt and Plumage Terminology of Howell et al. (2003) Still May Not Reflect Homologies
191
  ERNEST J. WILLOUGHBY
Understanding Evolution of Plumages and Other Cyclic Avian Life-History Phenomena: Role for an Improved Molt Terminology
196
  THEUNIS PIERSMA
Determining Evolutionary Homologies of Molts and Plumages: A Commentary on Howell et al. (2003)
199
  CHRISTOPHER W. THOMPSON
The First Basic Problem Revisited: Reply to Comments on Howell et al. (2003)
206
  STEVE N. G. HOWELL, CHRIS CORBEN, PETER PYLE AND DANNY I. ROGERS

ANNOUNCEMENT OF A NEW AWARD
211
INFORMATION FOR CONTRIBUTORS
212