Contents
Intraspecific Variation in the Hindlimb Muscles of the Ivory-billed Woodcreeper and the Blue Jay, with a Review of Other Species
Robert J. Raikow, Anthony H. Bledsoe, Tahniat Syed, and Angela G. Glasgow
Benign Neglect of Terminal Eggs in Herring Gulls
Sandra C. Lee, Roger M. Evans, and Shawn C. Bugden
Winter Territories and Night Roosts of Northern Shrikes in Idaho
Eric C. Atkinson
Winter Foraging and Diet Composition of Northern Shrikes in Idaho
Eric C. Atkinson and Tom J. Cade
Factors Limiting Fecundity of Captive Brown-headed Cowbirds
Kenneth C. Holford and Daniel D. Roby
Tree Swallows Cannot Be Classified as Determinate or Indeterminate Layers
Jeremy S. Mitchell and Raleigh J. Robertson
Free-living Willow Ptarmigan Are Determinate Egg-layers
Brett K. Sandercock
The Effect of Restricted Feeding on Plasma Growth Hormone (gh) Concentrations in Growing American Kestrels
Diane Lacombe, David M. Bird, Colin G. Scanes, and Kathy A. Hibbard
Selection of Foraging and Nesting Sites by Black-throated Blue Warblers: Their Relative Influence on Habitat Choice
Benjamin B. Steele
An Endogenous Basis for Differential Migration in the Dark-eyed Junco
Rebecca L. Holberton
Geographic Variation in the Song of the Rufous-collared Sparrow in Eastern Argentina
Pablo L. Tubaro, Enrique T. Segura, and Paul Handford
Food Choices by Northwestern Crows: Experiments with Captive, Free-ranging and Hand-raised Birds
Mary F. Willson and Tallchief A. Comet
Dietary Shifts among Songbirds from a Diflubenzuron-treated Forest
Bradley E. Sample, Robert J. Cooper, and Robert C. Whitmore
Ruffed Grouse Tolerance and Biotransformation of the Plant Secondary Metabolite Coniferyl Benzoate
Walter J. Jakubas, William H. Karasov, and Christopher G. Guglielmo
Geographic Variation in the Yellow-billed Cacique, Amblycercus Holosericeus, a Partial Bamboo Specialist
Andrew W. Kratter
Geographic Variation in Ontogeny of the Fox Sparrow
Kevin J. Burns
Distribution and Abundance of Marbled Murrelets in Alaska
John F. Piatt and R. Glenn Ford
Hybridization and Male Parental Investment in Birds
Raymond Pierotti and Cynthia A. Annett
The Annual Molt Cycle of Branta Canadensis Interior in Relation to Nutrient Reserve Dynamics
Robert J. Gates, David F. Caithamer, Thomas C. Tacha, and Charles R. Paine
Abundance and Distribution of Migrant Shorebirds in Delaware Bay
Kathleen E. Clark, Lawrence J. Niles, and Joanna Burger
Book Reviews
Christopher W. Thompson
New Books in Ornithology
Christopher W. Thompson
News and Notes
The Condor
History of the Condor
Glenn E. Walsberg
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Commentary
The Treatment of Biologists by the U.s. Fish and Wildlife Service
Glenn E. Walsberg
Letter to the Editor
Russell P. Balda
Short Communications
Predation of Nesting Larids by Peregrine Falcons at Rasa Island, Gulf of California, Mexico
Enriqueta Velarde
Direct and Indirect Consequences of Mink Presence in a Common Tern Colony
Gary P. Burness and Ralph D. Morris
Does Predator Assemblage Affect Reproductive Success in Songbirds?
Clinton K. Miller and Richard L. Knight
A Parametric Method for Comparing Dispersal Distances
J. Michael Reed
Social Tutoring of Adult Male White-crowned Sparrows
Richard M. Casey and Myron C. Baker
Aggression and Song Development in White-crowned Sparrows
Richard M. Casey and Myron C. Baker
Do Swallows Sunbathe to Control Ectoparasites? an Experimental Test
Charles R. Blem and Leann B. Blem
Effects of Nestling Provisioning on the Time-activity Budgets of Male Red-winged Blackbirds
Linda A. Whittingham
Maximum Diving Depths of Cape Gannets
N. J. Adams and C. B. Walter
Indentation Hardness of the Bill Keratin of the European Starling
Richard H. Bonser and Mark S. Witter
Food Habits of the Scarlet and White Ibis in the Orinoco Plains
Eduardo Aguilera, Cristina Ramo, and Benjamin Busto
Characteristics of Cache Sites Most Likely to Be Robbed by Willow Tits (parus Montanus)
Kimmo Inki and Jukka Suhonen
Thermoregulation in Free-ranging Whip-poor-wills
M. Brian Hickey