Contents
Differences in Repertoire Size, Singing Behavior, and Associated Neuroanatomy among Marsh Wren Populations Have a Genetic Basis
Donald E. Kroodsma and Richard A. Canady
Notes and News
The Auk
Hybridization, Introgression, and Morphometric Differentiation Between Mallard (anas Platyrhynchos) and Grey Duck (anas Superciliosa) in Otago, New Zealand
Grant D. Gillespie
The Effect of Temperature and Clutch Size on the Energetic Cost of Incubation in a Free-living Blue Tit (parus Caeruleus)
Svein Haftorn and Randi Eidsmo Reinertsen
The Effects of Visibility Bias on Time-budget Estimates of Niche Breadth and Overlap
David W. Bradley
Territory Size Variations in Shrubsteppe Birds
John A. Wiens, John T. Rotenberry, and Beatrice Van Horne
The Phylogeny of the Alcidae
J. G. Strauch Jr.
Multiple Paternity in a Territorial Passerine: the Bobolink
Thomas A. Gavin and Eric K. Bollinger
Elevational Correlates of Speciation and Intraspecific Geographic Variation in Plumage in Andean Forest Birds
Gary R. Graves
Seasonal Changes in Feeding Success, Activity Patterns, and Weights of Nonbreeding Sanderlings (calidris Alba)
J. L. Maron and J. P. Myers
Avian Anatomical Specimens: a Geographic Analysis of Needs
Marion Anne Jenkinson and D. Scott Wood
Recognition of Parents' Voices by Young Cliff Swallows
Michael D. Beecher, Philip K. Stoddard, and Patricia Loesche
The Taxonomy and Biogeography of the Thick-billed Flowerpecker Complex in Borneo
Frederick H. Sheldon
Foraging Success and Tree Species Use in the Least Flycatcher
Christopher M. Rogers
Natal Dispersal and Lek Fidelity of Sage Grouse
Peter O. Dunn and Clait E. Braun
100 Years Ago in the Auk
The Auk
Thirty-fifth Supplement to the American Ornithologists' Union Check-list of North American Birds
The Auk
Covers
Front Matter
The Auk
Back Matter
The Auk
Short Communications
The Arrangement and Structure of Feather Melanin Granules as a Taxonomic Character in African Starlings (sturnidae)
Adrian J. F. K. Craig and Alex H. Hartley
Clutch Size, Daylength, and Seasonality of Resources: Comments on Ashmole's Hypothesis
David J. T. Hussell
The Importance of Open Habitat to the Occurrence of Kleptoparasitism
Dennis R. Paulson
Adaptations of Black Tern (chlidonias Niger) Eggs for Water Loss in a Moist Nest
Thomas A. Davis and Ralph A. Ackerman
Energetics of Free-living Nestling House Finches: Measurements with Doubly Labeled Water
R. D. Gettinger, W. W. Weathers, and K. A. Nagy
The First Record of Locustella Lanceolata for North America
Theodore G. Tobish Jr.
Differential Distribution of Wintering Brant by Necklace Type
Larry D. Vangilder and Loren M. Smith
Floating Populations of Female Tree Swallows
Bridget J. Stutchbury and Raleigh J. Robertson
Predation in Relation to Spacing of Kingbird Nests
Peter J. Blancher and Raleigh J. Robertson
Ten-year Periodicity in Whooping Crane Census
Mark S. Boyce and Richard S. Miller