Contents
Another Threat Posed by Forest Fragmentation: Reduced Food Supply
Scott K. Robinson
Cooperative Breeding in the Frugivorous Toucan Barbet (semnornis Ramphastinus)
Carla Restrepo and Marta Lucy Mondrag
Nest Predation in Aspen Woodlots in an Agricultural Area in Alberta: the Enemy from Within
Susan J. Hannon and Susan E. Cotterill
Environmental Effects on Body Size of Canada Geese
James O. Leafloor, C. Davison Ankney, and Donald H. Rusch
Nest-site Characteristics and Reproductive Success in Magellanic Penguins (spheniscus Magellanicus)
David L. Stokes and P. Dee Boersma
The Barred Owl (strix Varia) Invasion in California
Shawna J. Dark and R. J. Guti
Foraging Flights of Breeding Thick-billed Murres (uria Lomvia) as Revealed by Bird-borne Direction Recorders
Silvano Benvenuti, Francesco Bonadonna, Luigi Dall'Antonia, and Gudmundur A. Gudmundsson
Flexible Growth Rates in Fork-tailed Storm-petrels: a Response to Environmental Variability
P. Dee Boersma and Julia K. Parrish
The Adrenocortical Response to Stress in Incubating Magellanic Penguins (spheniscus Magellanicus)
Laura C. Hood, P. Dee Boersma, and John C. Wingfield
Re-evaluation of Adult Survival of Black-headed Gulls (larus Ridibundus) in Presence of Recapture Heterogeneity
Anne-caroline Prevot-Julliard, Jean-Dominique Lebreton, and Roger Pradel
Influence of Food Abundance, Nest-site Habitat, and Forest Fragmentation on Breeding Ovenbirds
Dawn M. Burke and Erica Nol
Phylogenetic Patterns in the Trochilidae
John A. Gerwin and Robert M. Zink
Patterns of Cavity-entrance Orientation by Gilded Flickers (colaptes Chrysoides)in Card
Patrick W. Zwartjes and Shawn E. Nordell
Molecular and Osteological Heron Phylogenies: Sources of Incongruence
Kevin G. Mccracken and Frederick H. Sheldon
Contrasts in Scheduling of Molt and Migration in Eastern and Western Warbling-vireos
Gary Voelker and Sievert Rohwer
Sugar Preferences and Side Bias" in Cape Sugarbirds and Lesser Double-collared Sunbirds"
Susan Jackson, Susan W. Nicolson, and Christopher N. Lotz
Evaluation of the Cyclopropane Absorption Method of Measuring Avian Body Fat
James A. Gessaman, Roy D. Nagle, and Justin D. Congdon
Cytochrome-b Evidence for Validity and Phylogenetic Relationships of Pseudobulweria and Bulweria (procellariidae)
Vincent Bretagnolle, Carole Attie, and Eric Pasquet
Guts Don't Fly: Small Digestive Organs in Obese Bar-tailed Godwits
Theunis Piersma and Robert E. Gill Jr.
In Memoriam: Dioscoro S Rabor, 1911-1996
Robert S. Kennedy and Hector C. Miranda Jr.
In Memoriam: Philip L Wright, 1914-1997
Jeffrey S. Marks
In Memoriam: Charles M Weise, 1926-1997
Millicent Sigler Ficken
In Memoriam: Philip Atkinson Dumont, 1903-1996
James J. Dinsmore
William Brewster Memorial Award, 1997:
John C. Avise
Elliott Coues Award, 1997:
Chandler S. Robbins
100 Years Ago in the Auk
The Auk
Notes and News
The Auk
Covers
Front Matter
The Auk
Back Matter
The Auk
Short Communications
Body Mass, Ambient Temperature, Time of Day, and Vigilance in Tufted Titmice
Vladimir V. Pravosudov and Thomas C. Grubb Jr.
Behavioral Interactions Between Golden-winged and Blue-winged Warblers
John L. Confer and Jeffery L. Larkin
Numts: a Challenge for Avian Systematics and Population Biology
Michael D. Sorenson and Thomas W. Quinn
Prey Selection by Breeding and Nonbreeding Barn Owls in Argentina
M. Isabel Bellocq
Extrapair Paternity Associated with Renesting in the American Goldfinch
G. J. Gissing, T. J. Crease, and A. L. A. Middleton
Early Arrival is Not Advantageous for Rufous Bush-robins Parasitized by Common Cuckoos
Jose Javier Palomino, Manuel Martin-Vivaldi, and Manuel Soler
Recent Change in the Winter Distribution of Rufous Hummingbirds
Geoffrey E. Hill, Robert R. Sargent, and Martha B. Sargent
Commentaries
Response to Latta and Baltz (1997)
John H. Rappole and M. Victoria Mcdonald
History and Tradition, or Contemporary Ornithology? Why Ornithological Journals Should Not Have Bird Names
J. V. Remsen Jr., James A. Kushlan, and Bette A. Loiselle
Keep the Auk" Alive and Flying"
Glen E. Woolfenden, Jack P. Hailman, and Wesley E. Lanyon