THE CONDOR
Vol. 103, Number 3
August 2001
TABLE OF CONTENTS

FEATURE ARTICLES

Morphological Heritability in a Hybrid Bunting Complex: Nesospiza at Inaccessible Island		429
	PETER G. RYAN
Genetic Structuring among Migratory Populations of the Black-whiskered Vireo, with a Comparison to the Red-eyed Vireo		439
	PATRICK W. ZWARTJES
Attenuated Outer Primaries in Pigeons and Doves: a Comparative Test Fails to Support the Flight Performance Hypothesis		449
	BETTINA MAHLER AND PABLO LUIS TUBARO
Winter Site Fidelity of Prairie Warblers in the Dominican Republic		455
	STEVEN C. LATTA AND JOHN FAABORG
Time Allocation and Foraging Pattern of Chick-Rearing Razorbills in Northwest Iceland		469
	LUIGI DALL'ANTONIA, GUDMUNDUR A. GUDMUNDSSON AND SILVANO BENVENUTI
Effect of Instrument Attachment and Other Factors on Foraging Trip Duration and Nesting Success of Adélie Penguins		481
	GRANT BALLARD, DAVID G. AINLEY, CHRISTINE A. RIBIC AND KERRY R. BARTON
Reproductive Success of Lewis's Woodpecker in Burned Pine and Cottonwood Riparian Forests		491
	VICTORIA A. SAAB AND KERRI T. VIERLING
Spatial and Temporal Variability in Nest Success of Snail Kites in Florida: a Meta-Analysis		502
	VICTORIA J. DREITZ, ROBERT E. BENNETTS, BRIAN TOLAND, WILEY M. KITCHENS AND MICHAEL W. COLLOPY
Reproductive Success of Water Pipits in an Alpine Environment		510
	KURT BOLLMAN AND HEINZ-ULRICH REYER
Number of Close Spatial and Temporal Neighbors Decreases the Probability of Nest Failure and Shiny Cowbird Parasitism in Colonial Yellow-winged Blackbirds		521
	VIVIANA MASSONI AND JUAN CARLOS REBOREDA
Does Habitat Fragmentation Influence Nest Predation in the Shortgrass Prairie?		530
	MELISSA N. HOWARD, SUSAN K. SKAGEN AND PATRICIA L. KENNEDY
Nesting and Reproductive Activities of Greater Sage-Grouse in a Declining Northern Fringe Population		537
	CAMERON L. ALDRIDGE AND R. MARK BRIGHAM
How General is the Central-Periphery Distribution among Seabird Colonies? Nest Spatial Pattern in the European Shag		544
	ALBERTO VELANDO AND JUAN FREIRE
Life History Implications of Complete and Incomplete Primary Molts in Pelagic Cormorants		555
	CHRISTOPHER E. FILARDI AND SIEVERT ROHWER
Covariation of Clutch Size, Laying Date, and Incubation Tendency in the American Kestrel		570
	KEITH W. SOCKMAN AND HUBERT SCHWABL
Ptilochronology Reveals Differences in Condition of Captive White-throated Sparrows		579
	KENDELL D. JENKINS, DANA M. HAWLEY, CHRISTOPHER S. FARABAUGH AND DANIEL A. CRISTOL
Female Condition: a Predictor of Hatching Synchrony in the House Wren?		587
	LISA A. ELLIS, JOHN D. STYRSKY, ROBERT C. DOBBS AND CHARLES F. THOMPSON
Variations in Calcium Use by Birds during the Breeding Season		592
	ANDRÉ A. DHONDT AND WESLEY M. HOCHACHKA
Predicting Species' Geographic Distributions Based on Ecological Niche Modeling		599
	A. TOWNSEND PETERSON
Influence of Military Activities on Raptor Abundance and Behavior		606
	LINDA S. SCHUECK, JOHN M. MARZLUFF AND KAREN STEENHOF
SHORT COMMUNICATIONS
Passive Interference Competition by Glaucous-winged Gulls on Black-legged Kittiwakes: a Cost of Feeding in Flocks		616
	JOHN M. MANISCALCO, WILLIAM D. OSTRAND, ROBERT M. SURYAN AND DAVID B. IRONS
Organochlorine Concentrations and Eggshell Thickness in Failed Eggs of the California Clapper Rail from South San Francisco Bay		620
	STEVEN E. SCHWARZBACH, JOHN D. HENDERSON, CARMEN M. THOMAS AND JOY D. ALBERTSON
Passerine Densities in Riparian Forests of Southeast Alaska: Potential Effects of Anadromous Spawning Salmon		624
	SCOTT M. GENDE AND MARY F. WILLSON
Bivouac Checking, a Novel Behavior Distinguishing Obligate from Opportunistic Species of Army-Ant-Following Birds		629
	MONICA BETH SWARTZ
Foraging before Spring Migration and before Breeding in Common Eiders: Does Hyperphagia Occur?		633
	MAGELLA GUILLEMETTE
Nest Desertion and Apparent Nest Protection Behavior by Bell's Vireos in Response to Cowbird Parasitism		639
	JOEL M. BUDNIK, DIRK E. BURHANS, MARK R. RYAN AND FRANK R. THOMPSON III
Movements and Survival of Lark Bunting Fledglings		643
	AMY A. YACKEL ADAMS, SUSAN K. SKAGEN AND ROD D. ADAMS
The Function of Displays of Male Rufous Hummingbirds		647
	T. ANDREW HURLY, RENÉE D. SCOTT AND SUSAN D. HEALY
Correlation of Red-shouldered Hawk Abundance and Macrohabitat Characteristics in Southern Ohio		652
	CHERYL R. DYKSTRA, F. BERNARD DANIEL, JEFFREY L. HAYS AND MELINDA M. SIMON
Occurrence of Greater Sage-Grouse X Sharp-tailed Grouse Hybrids in Alberta		657
	CAMERON L. ALDRIDGE, SARA J. OYLER-MCCANCE AND R. MARK BRIGHAM
COMMENTARY
Some Considerations on the Use of Ecological Models to Predict Species' Geographic Distributions		661
	BRUCE G. PETERJOHN
BOOK REVIEWS
A Guide to the Birding Hot-Spots of Israel, by Hadoram Shirihai, James P. Smith, Guy M. Kirwan, and Dan Alon		664
	ZEV LABINGER
Diseases of Wild Waterfowl, 2nd Edition, by Gary A. Wobeser		665
	CHARLES VAN RIPER III