Contents
Feather-busting Bacteria
Dale H. Clayton
A New Species of Pygmy-owl (strigidae: Glaucidium) from the Pacific Slope of the Northern Andes
Mark B. Robbins and F. Gary Stiles
Factors Influencing Counts in an Annual Survey of Snail Kites in Florida
Robert E. Bennetts, William A. Link, John R. Sauer, and Paul W. Sykes Jr.
Population Genetics of a Hybrid Zone Between the Red-legged Partridge and Rock Partridge
Ettore Randi and Ariane Bernard-Laurent
Molecular Genetic (rapd) Analysis of Leach's Storm-petrels
Ian G. Paterson and Marlene Snyder
Enhanced Reproductive Success of Female Black-capped Chickadees Mated to High-ranking Males
Ken Otter, Scott M. Ramsay, and Laurene Ratcliffe
Reproductive Success and Nest-site Selection in a Cooperative Breeder: Effect of Experience and a Direct Benefit of Helping
B. J. Hatchwell, A. F. Russell, M. K. Fowlie, and D. J. Ross
Occurrence of Feather-degrading Bacilli in the Plumage of Birds
Edward H. Burtt Jr. and Jann M. Ichida
The Ecology of Song Improvisation as Illustrated by North American Sedge Wrens
Donald E. Kroodsma, Wan-Chun Liu, Elijah Goodwin, and Paul A. Bedell
Geographic Variation in Black-capped Chickadee Songs and Singing Behavior
Donald E. Kroodsma, Bruce E. Byers, Sylvia L. Halkin, Christopher Hill, Dolly Minis, Jeffrey R. Bolsinger, Jo-Anne Dawson, Elizabeth Donelan, Jeffrey Farrington, Frank B. Gill, Peter Houlihan, Doug Innes, Geoff Keller, Linda Macaulay, Curtis A. Marantz, Jan Ortiz, Philip K. Stoddard, and Krista Wilda
Size-selective Predation of Blue Mussels (mytilus Edulis) by Common Eiders (somateria Mollissima) under Controlled Field Conditions
Diana J. Hamilton, Thomas D. Nudds, and Jennifer Neate
The Function of Early Onset of Nocturnal Incubation in Red-winged Blackbirds
Ethan D. Clotfelter and Ken Yasukawa
A New Trogon from the Middle Oligocene of C
Gerald Mayr
Annual Survival of Snail Kites in Florida: Radio Telemetry Versus Capture-resighting Data
Robert E. Bennetts, Victoria J. Dreitz, Wiley M. Kitchens, James E. Hines, and James D. Nichols
Brown-headed Cowbird Nestling Vocalizations and Risk of Nest Predation
Donald C. Dearborn
Postbreeding Movements and Habitat Use of Adult Wood Thrushes in Northern Virginia
J. H. Rivera, W. J. Mcshea, J. H. Rappole, and C. A. Haas
Fitness Components Associated with Clutch Size in Cliff Swallows
Charles R. Brown and Mary Bomberger Brown
Species Differences in Male Parental Care in Birds: a Reexamination of Correlates with Paternity
P. L. Schwagmeyer, Robert C. Clair, James D. Moodie, Timothy C. Lamey, Gary D. Schnell, and Michelle N. Moodie
Why Do Aptenodytes Penguins Have High Divorce Rates?
Joel Bried, Frederic Jiguet, and Pierre Jouventin
Florida Scrub-jay Demography and Dispersal in a Fragmented Landscape
David R. Breininger
Breeding Success of Pied Flycatchers in Artificial Forest Edges: the Effect of a Suboptimally Shaped Foraging Area
Esa Huhta, Jukka Jokimaki, and Pekka Rahko
In Memoriam: Emmet Reid Blake, 1908-1997
Melvin A. Traylor Jr. and David E. Willard
In Memoriam: Tso-hsin Cheng, 1906-1998
Weishu Hsu
100 Years Ago in the Auk
The Auk
Covers
Front Matter
The Auk
Back Matter
The Auk
Short Communications
Kleptoparasitism by Brown Skuas on Albatrosses and Giant-petrels in the Indian Ocean
Larry B. Spear, Steve N. Howell, Cornelia S. Oedekoven, Delphine Legay, and Joel Bried
Consequences of Egg-size Variation in the Red-winged Blackbird
Wendy L. Turner and Paul R. Sotherland
The Role of Cavity Size in the Evolution of Clutch Size in Tree Swallows
Laurie M. Stewart and Raleigh J. Robertson
Functional Roles in Mixed-species Foraging Flocks: a Field Manipulation
Andrew S. Dolby and Thomas C. Grubb Jr.
Commentaries
Gone with the Wind? a Comment on Butler Et Al (1997)
Anders Hedenstrom and Thomas P. Weber
Reply to Hedenstr
R. W. Butler, T. D. Williams, M. A. Bishop, and N. Warnock