Contents
Ecological Correlates of Group Size in a Communally Breeding Jay
Jerram L. Brown and Esther R. Brown
Long Call Displays of Sympatric South Polar and Brown Skuas
Pamela J. Pietz
The Non-song Vocal Repertoire of the White-crowned Sparrow
Brad G. Hill and M. Ross Lein
North American Migrants in Bolivia
H. E. Dott
Annual Molt Pattern in a Malaysian Population of Fantail Warblers (cisticola Juncidis)
Michael L. Avery
Spread-winged Posture of Turkey Vultures: Single or Multiple Function?
Robert G. Clark and Robert D. Ohmart
Preferred Nest Spacing of an Obligate Cavity-nesting Bird, the Tree Swallow
Alison Muldal, H. Lisle Gibbs, and Raleigh J. Robertson
Nest Site Selection by Laughing Gulls: Comparison of Tropical Colonies (culebra, Puerto Rico) with Temperate Colonies (new Jersey)
Joanna Burger and Michael Gochfeld
Replacement-clutching and Annual Nesting of California Condors
Noel F. Snyder and Janet A. Hamber
Vocalizations of Common Ravens in Virginia
Richard N. Conner
Recent Publications
The Condor
Avoidance of Salt-loading by a Diving Bird at a Hypersaline and Alkaline Lake: Eared Grebe
Sheila A. Mahoney and Joseph R. Jehl Jr.
Escorting Flight and Agonistic Interactions in Wintering Northern Harriers
Keith L. Bildstein and Michael W. Collopy
Nocturnal Singing by Marsh Wrens
Robert M. Barclay, Marty L. Leonard, and Gaynette Priesen
Commentary
The Condor
News and Notes
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Short Communications
Migrant and Breeding Peregrine Falcons in Northwestern Peru
Peter K. Schoonmakler, Michael P. Wallace, and Stanley A. Temple
A Reexamination of the Metabolic Response of House Finches to Temperature
William R. Dawson, William A. Buttemer, and Cynthia Carey
Sexual Color and Size Variation in the South Polar Skua
David G. Ainley, Larry B. Spear, and Robert C. Wood
Buff-breasted Sandpipers Nesting in Association with Black-bellied Plovers
Dennis R. Paulson and W. James Erckmann
Food Theft in the Presence of Abundant Food in Herring Gulls
Geoffrey S. Lebaron and Frank H. Heppner
Fork-tailed Storm-petrel Records from Inland Alaska
Timothy O. Osburne
Double Brooding by American Kestrels in Central Missouri
Brain R. Toland
Orientation of American Kestrel Nest Cavities and Nest Trees
Martin G. Raphael
Pesticide Concentrations in Snail Kite Eggs and Nestlings in Florida
Paul W. Sykes Jr.
Leucism in Eared Grebes in Western North America
Joseph R. Jehl Jr.
Cave Swallow Paired with Cliff Swallows
Thomas R. Huels
Risks of Clustering in Thermally-stressed Swallows
Patrick J. Weatherhead, Spencer G. Sealy, and Robert R. Barclay