THE CONDOR
Vol. 104, Number 2
May 2002 C.E.
TABLE OF CONTENTS

FEATURE ARTICLES

Mass Change Pattern of Blackcaps Refueling during Spring Migration: Evidence for Physiological Limitations to Food Assimilation		231
	LEONARD Z. GANNES
Cavity Adoption and the Evolution of Coloniality in Cavity-Nesting Birds		240
	JESSICA R. EBERHARD
Objective Assessment of Sexual Plumage Dichromatism in the Picui Dove		248
	BETTINA MAHLER AND BART KEMPENAERS
Do Feeder Counts Reliably Indicate Bird Population Changes? 21 Years of Winter Bird Counts in Ontario, Canada		255
	DENIS LEPAGE AND CHARLES M. FRANCIS
Residency and Movement Patterns of Wintering Dunlin in the Willamette Valley of Oregon		271
	PETER M SANZENBACHER AND SUSAN M. HAIG
Adaptive Modification of Tail Structure in Relation to Body Mass and Buckling in Woodcreepers		281
	PABLO L. TUBARO, DARIO A. LIJTMAER, MARIA G. PALACIOS AND CECILIA KOPUCHIAN
Differential Survival of Yearling and Adult Female Mallards and Its Relation to Breeding Habitat Conditions		297
	KEVIN W. DUFOUR AND ROBERT G. CLARK
Local Survival of Adult and Juvenile Marbled Murrelets and Their Importance for Estimating Reproductive Success		309
	CECILIA LOUGHEED, LYNN W. LOUGHEED, FRED COOKE AND SEAN BOYD
Techniques for Investigating Breeding Chronology in Marbled Murrelets, Desolation Sound, British Columbia		319
	CECILIA LOUGHEED, BRETT A. VANDERKIST, LYNN W. LOUGHEED AND FRED COOKE
Landscape-Scale Relationships between Abundance of Marbled Murrelets and Distribution of Nesting Habitat		331
	MARTIN G. RAPHAEL, DIANE EVANS MACK AND BRIAN A. COOPER
Do Some Northern Goshawk Nest Areas Consistently Fledge More Young Than Others?		343
	ERICA L. MCCLAREN, PATRICIA L. KENNEDY AND SARAH R. DEWEY
Breeding Success in the Western Gull x Glaucous-winged Gull Complex: The Influence of Habitat and Nest-Site Characteristics		353
	THOMAS P. GOOD
Hooded Warbler Nesting Success Adjacent to Group Selection and Clearcut Edges in a Southeastern Bottomland Forest		366
	CHRISTOPHER E. MOORMAN, DAVID C. GUYNN JR AND JOHN C. KILGO
Large-Scale Geographic Variation in Songs of Gambel's White-crowned Sparrows		378
	GLEN CHILTON, MYRA O. WIEBE AND PAUL HANDFORD
Vocal Distinctiveness and Response to Conspecific Playback in the Spotted Antbird, a Neotropical Suboscine		387
	SUSANNE C. BARD, MICHAELA HAU, MARTIN WIKELSKI AND JOHN C. WINGFIELD
Selection of Incubation Mound Sites by Three Sympatric Megapodes in Papua New Guinea		395
	J. ROSS SINCLAIR
A Neglected Cost of Brood Parasitism: Egg Punctures by Shiny Cowbirds during Inspection of Potential Host Nests		407
	VIVIANA MASSONI AND JUAN CARLOS REBOREDA
Male-Female Differences in Parental Care in Monogamous Crested Auklets		413
	GAIL S. FRASER, IAN L. JONES AND FIONA M. HUNTER
Microsatellite Polymorphism and Genetic Structure of Florida Mottled Duck Populations		424
	CHRISTEN L. WILLIAMS, RICHARD C. BRUST AND OLIN E. RHODES JR.
SHORT COMMUNICATIONS
Hybridization and Population Subdivision within and between Ross's Geese and Lesser Snow Geese: A Molecular Perspective		432
	JASON D. WECKSTEIN, ALAN D. AFTON, ROBERT M. ZINK AND RAY T. ALISAUSKAS
Nestling Sex Ratios in the Yellow-naped Amazon: No Evidence for Adaptive Modification		437
	JASON M. SOUTH AND TIMOTHY F. WRIGHT
Diving Behavior of the Red-legged Cormorant in Southeastern Patagonia, Argentina		440
	ESTEBAN FRERE, FLAVIO QUINTANA AND PATRICIA GANDINI
Short Underwater Opening of the Beak following Immersion in Seven Penguin Species		444
	YAN ROPERT-COUDERT, AKIKO KATO, RORY P. WILSON AND MASANORI KURITA
Effects of Data-Loggers Implanted for a Full Year in Female Common Eiders		448
	MAGELLA GUILLEMETTE, ANTHONY J. WOAKES, ANNETTE FLAGSTAD AND PATRICK J. BUTLER
Patch Choice and Foraging Behavior of Nonbreeding American Flamingos in Yucatán, Mexico		452
	FELICITY ARENGO AND GUY A. BALDASSARRE
Variation in Size, Composition, and Quality of Ruddy Duck Eggs and Ducklings		457
	JEFFREY T. PELAYO AND ROBERT G. CLARK
BOOK REVIEWS
A Passion for Birds/ American Ornithology after Audubon, by Mark V. Barrow, Jr.		463
	PETER STETTENHEIM
A Manual for Wildlife Radio Tracking, by Robert E. Kenward		464
	JOHN M. MARZLUFF
Cuckoos, Cowbirds and Other Cheats, by Nicholas B. Davies		466
	MARK E. HAUBER
Galápagos Diary, by Hermann Heinzel and Barnaby Hall		467
	GEORGE W. COX