Contents
Female-female Pairing in Ring-billed Gulls
John P. Ryder and Patricia Lynn Somppi
Female-female Pairs and Other Unusual Reproductive Associations in Ring-billed and California Gulls
Michael R. Conover, Don E. Miller, and George L. Hunt Jr.
Patterns of Growth in Birds V a Comparative Study of Development in the Starling, Common Tern, and Japanese Quail
Robert E. Ricklefs
Notes and News
The Auk
Juvenile Dispersal and Development of Site-fidelity in the Black-capped Chickadee
Charles M. Weise and John R. Meyer
Breeding Cycle and Behavior of the Semipalmated Sandpiper at Barrow, Alaska
Shoshana Ashkenazie and Uriel N. Safriel
Does the Wing Molt Cause Nutritional Stress in Lesser Snow Geese?
C. Davison Ankney
Social Status Signaling in Winter Flocking Birds: an Examination of a Current Hypothesis
Martha Hatch Balph, David F. Balph, and H. Charles Romesburg
Status Signaling in Dark-eyed Juncos
Ellen D. Ketterson
Egg Temperatures of the Rockhopper Penguin and Some Other Penguins
A. E. Burger and A. J. Williams
Testosterone and Daylength-dependent Development of Comb Size and Breeding Plumage of Male Willow Ptarmigan (lagopus Lagopus Lagopus)
Karl-arne Stokkan
Editor's Comments
The Auk
Nestling Mortality and the Adaptive Significance of Early Locomotion in the Little Blue Heron
David F. Werschkul
Territory Size and Composition in Relation to Resource Abundance in Lapland Longspurs Breeding in Arctic Alaska
T. R. Seastedt and S. F. Maclean
Numbers and Habitat Selection of Cassin's Auklet Breeding on Triangle Island, British Columbia
Kees Vermeer, Rebecca A. Vermeer, Kenneth R. Summers, and Raymond R. Billings
Land Bird Densities on Baja California Islands
John T. Emlen
Commentary the Amateur in Ornithology
Harold F. Mayfield
In Memoriam: Aretas Andrews Saunders
Joseph Brauner
The Status of Agelaius Forbesi Sclater
Lester L. Short and Kenneth C. Parkes
Observations on Some Fruit-eating Birds in Mexico
Gail E. Kantak
Diet-correlated Variations in Social Behavior of Wintering Tennessee Warblers
Elliot J. Tramer and Thomas R. Kemp
Discovery of an Oilbird Colony in the Western Drainage of the Ecuadorian Andes
Fernando I. Ortiz-Crespo
Caprimulgus Indicus, Eurynorhynchus Pygmeus, Otus Scops, and Limicola Falcinellus in the Aleutian Islands, Alaska
Robert H. Day, Eric P. Knudtson, Dennis W. Woolington, and Robert P. Schulmeister
Permeability of Magpie and Blackbird Eggshells to Water Vapor: Variation among and Within Nests of a Single Population
Paul R. Sotherland, Gary C. Packard, and Theodore L. Taigen
Food-storing by Yellow-bellied Sapsuckers
Richard N. Conner and James C. Kroll
Seasonality, Clutch Size, and Hatching Success in the Cedar Waxwing
Charles F. Leck and Frederic L. Cantor
Molt Pattern as a Clue to San Blas Jay Ancestry
John William Hardy
Great Horned Owl Predation on Leach's Storm-petrels in Maine
Thomas W. French
A Nearly Synchronous Hatching of Barn Owls
Leonard J. Soucy Jr.
Status of the Genus Phalacrocorax in Puerto Rico Including the First Records of P Auritus
Herbert A. Raffaele
Observations at a Nest of a Partial Albino Red-headed Woodpecker
David T. Rogers Jr., Jerome A. Jackson, Bette J. Schardien, and Martha S. Rogers
Covers
Front Matter
The Auk
Back Matter
The Auk