THE CONDOR
Vol. 103, Number 1
February 2001
TABLE OF CONTENTS

FEATURE ARTICLES

Comparative Phylogeography of Some Aridland Bird Species		1
	ROBERT M. ZINK, ANN E. KESSEN, THERESA V. LINE AND RACHELLE C. BLACKWELL-RAGO
Using Hydrogen Isotope Geochemistry to Estimate the Natal Latitudes of Immature Cooper's Hawks Migrating Through the Florida Keys		11
	TIMOTHY D. MEEHAN, CASEY A. LOTT, ZACHARY D. SHARP, RUTH B. SMITH, ROBERT N. ROSENFIELD, ANDREW C. STEWART AND ROBERT K. MURPHY
Importance of the Supratidal Habitats for Maintaining Overwintering Shorebird Populations: How Redshanks Use Tidal Mudflats and Adjacent Saltworks in Southern Europe		21
	JOSÉ A. MASERO AND ALEJANDRO PÉREZ-HURTADO
Nonbreeding Habitat Selection and Foraging Behavior of the Black-throated Green Warbler Complex in Southeastern Mexico		31
	RUSSELL GREENBERG, CLAUDIA ELIA GONZALES, PETER BICHIER AND ROBERT REITSMA
Foraging Success and Foraging Habitat Use by Cattle Egrets and Little Egrets in the Camargue, France		38
	KATIA LOMBARDINI, ROBERT E. BENNETTS AND CHRISTOPHE TOURENQ
Seasonal Fluctuations of Birds, Fruits, and Flowers in a Subtropical Forest of Argentina		45
	LUCIO R. MALIZIA
Lilac-crowned Parrot Diet and Food Resource Availability: Resource Tracking by a Parrot Seed Predator		62
	KATHERINE RENTON
Diet and Hunting Behavior of the Crane Hawk in Tikal National Park, Guatemala		70
	JASON SUTTER, WALTER E. MARTÍNEZ A., FRANCISCO OLIVA T., NERY OSWALDO J. AND DAVID F. WHITACRE
A New Specimen of the Tiny Middle Eocene Bird Gracilitarsus mirabilis (New Family: Gracilitarsidae)		78
	GERALD MAYR
Does Risk of Nest Failure or Adult Predation Influence Hatching Patterns of the Green-rumped Parrotlet?		85
	SCOTT H. STOLESON AND STEVEN R. BEISSINGER
Reproductive Biology of Sabine's Gull in the Canadian Arctic		98
	IAIN J. STENHOUSE, H. GRANT GILCHRIST AND WILLIAM A MONTEVECCHI
Contrasting Brood Sizes in Common and Arctic Terns: The Roles of Food Provisioning Rates and Parental Brooding		108
	JAMES A. ROBINSON, KEITH C. HAMER AND LORRAINE S. CHIVERS
Post-Fledging Dispersal of Burrowing Owls in Southwestern Idaho: Characterization of Movements and Use of Satellite Burrows		118
	R. ANDREW KING AND JAMES R. BELTHOFF
Effects of Brown-headed Cowbirds on the Nesting Success of Chipping Sparrows in Southwest Colorado		127
	CATHERINE P. ORTEGA AND JOSEPH C. ORTEGA
Repertoire, Structure, and Individual Distinctiveness of Thick-billed Murre Calls		134
	KARA LEFEVRE, ANTHONY J. GASTON AND ROBERT MONTGOMERIE
Do Woodpecker Drums Encode Information for Species Recognition?		143
	DANIELLE J. DODENHOFF, ROBERT D. STARK AND ERIC V. JOHNSON
Male Badge Size Predicts Dominance Against Females in House Sparrows		151
	ANDRÁS LIKER AND ZOLTÁN BARTA
SHORT COMMUNICATIONS
Extra-Pair Paternity in the Common Murre		158
	TIM R. BIRKHEAD, BEN J. HATCHWELL, ROBERT LINDNER, DONALD BLOMQVIST, E. JAYNE PELLATT, RICHARD GRIFFITHS AND JAN T. LIFJELD
Aggressive Nest Intrusions by Male Humboldt Penguins		162
	SABRINA S. TAYLOR, MARTY L. LEONARD AND DARYL J. BONESS
Female Responses to Intraspecific Brood Parasitism in the Tree Swallow		166
	LINDA A. WHITTINGHAM AND PETER O. DUNN
Context and Frequency of Infanticide in the Communally Breeding Guira Cuckoo		170
	REGINA H. F. MACEDO, MARIANA CARIELLO AND LAURA MUNIZ
Daily Energy Expenditure of Nestling Bald Eagles in Northern Wisconsin		175
	CHERYL R. DYKSTRA, WILLIAM H. KARASOV, MICHAEL W. MEYER AND D. KEITH WARNKE
Differences in Depredation by Small Predators Limit the Use of Clay and Zebra Finch Eggs in Artificial-Nest Studies		180
	THOMAS J. MAIER AND RICHARD M. DEGRAAF
Assessing Raptor Diet: Comparing Pellets, Prey Remains, and Observational Data at Hen Harrier Nests		184
	STEPHEN M. REDPATH, ROGER CLARKE, MIKE MADDERS AND SIMON J. THIRGOOD
Size Characteristics of Stones Ingested by Common Loons		189
	J. CHRISTIAN FRANSON, SCOTT P. HANSEN, MARK A. POKRAS AND ROSE MICONI
Accipiter Predation of American Redstart Nestlings		192
	CYNTHIA A. MCCALLUM AND SUSAN J. HANNON
Egg Size, Body Size, Locomotion, and Feeding Performance in Captive King Eider Ducklings		195
	VANESSA R. ANDERSON AND RAY T. ALISAUSKAS
BOOK REVIEWS
The Directory of Australian Birds: Passerines, by Richard Schodde and Ian J. Mason		200
	NED K. JOHNSON
Handbook of the Birds of the World. Vol. 5. Barn-owls to Hummingbirds, by Josep del Hoyo, Andrew Elliot, and Jordi Sargatal, eds.		200
	KEVIN J. BURNS
National Audubon Society Birder's Handbook, by Stephen W. Kress		201
	PHILIP R. PRYDE
Working Bibliography of Cuckoos and Turacos of the World, by Johannes Erritzoe, with contributions by Oscar van Rootselaar		202
	JUAN JOSÉ SOLER AND MANUEL SOLER
FROM THE EDITOR		203
NEWS AND NOTES		204
INFORMATION FOR CONTRIBUTORS		205