NEW RELEASE AVIAN FORAGING: THEORY, METHODOLOGY, AND APPLICATIONS MICfjAEL L. MORRISON, C. JOHN RALPH, JARED VERNER. AND JOSEPH R. JEHL. JR Order from: EDITORS Cooper Ornithological Society Western Foundation of Vertebrate zoology 1100 Glendon Ave., Suite 1400 Los Angeles, CA 90024 USA All order must be prepaid in U.S. dollars. Make checks payable to the Cooper Ornithological Society STUDIES IN AVIAN BIOLOGY NO. 13 $29.50 (includes postage & ha&Ii@ Other recent publications: SAB 11: Bird Communities at Sea off California: 1975 to 1983 $ 7.00 SAB 12: Biology of the Eared Grebe and Wilsons’ Phalarope in the Nonbreeding Season: A Study of Adaptations to Saline Lakes $14.00 3-5-1OSALE NEW REDUCED PRICES EFFECTIVEJULY 1 Original Price New Price SAB 2: Shorebirds in Marine Environments . $ 5.00 SAB 3: Bird Communi Dynamics in A Ponderosa Pine . % ore& . 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Jennings Western Foundation of Vertebrate Zoology 1100 Glendon Avenue, Suite 1400 Los Angeles, CA 90024 USA All Orders must be prepaid in U.S. dollars Make checks payable to the Cooper Ornithological Society 1990 MEETING OF THE AMERICAN SOCIETY OF ZOOLOGISTS with the AMERICAN MICROSCOPICAL SOCIETY, ANIMAL BEHAVIOR SOCIETY THE CRUSTACEAN SOCIETY, INTERNATIONAL ASSOCIATION OF ASTACOLOGY AND THE SOCIETY OF SYSTEMATIC ZOOLOGY Marriott Rivercenter Housing Rates San Antonio, Texas $66/roam for single December 27-30 or double rooms Call for Papers: April 1990 Abstract Deadline: August 1, 1990 For Poster or Oral Papers ASZ DIVISIONAL SYMPOSIA AND WORKSHOPS Mechanisms of Mate Choice Neural Aspects of Reproductive Endocrinology: Old Questions, New Approaches Neuroendocrine Strategies in a Tropical Environment Animal Immunity: Biomarkers for Assessment of Risks from Environmental Xenobiotics Amphibian Metamorphosis The Compleat Crab: Physiological Ecology of Everyday Life and Special Events The Evolution of Viviparity in Vertebrates Life History and Evolution in Uncertain Environments New Perspectives in Marine Soft-bottom Ecology Amphibian Relationships: Phylogenetic Analysis of Morphology and Molecules Ecological Morphology: Integrative Approaches in Organismal Biology Development and Macroevolution SOCIETY-SPONSORED SYMPOSIA AND REFRESHER COURSES Computational Approaches to Comparative Neurobiology (ASZ) “Aschelminphes” Revisited: A Refresher Course (AMS) Animal Care and Use Committees in Zoological Research Departments (ASZ) History of Carcinology (TCS) SPECIAL SESSIONS Biologists and the Media The Process of Publishing Papers Improving Visual Communications in Science: Posters, Slide Presentations, and Quantitative Data Displays SPECIAL EXHIBIT Nature in the New World: An Exhibition of Paintings and Photographs Meeting Hosted by Trinity University and Univ. of Texas Health Science Center, Thomas L. Koppenheffer and Mary K. Vaughan, Co-Chairpersons of the Local Committee For more information, contact: Mary Adams-Wiley, Executive Officer, American Society of Zoologists, 104 Sirius Circle, Thousand Oaks, California 91360 Phone: (805) 492-3585 l Fax: (805) 492-0370 SANANTONIO 1990 (Continued from outside back cover) Function of Crest Displays in Royal Flycatchers(Onychorhynchus) GARY R. GRAVES 522 Daytime Feeding by Leach’s Storm-Petrel on a Midwater Fish in the Eastern Tropical Pacific ROBERT L. PITMAN and LISA T. BALLANCE 524 Song as Part of High Intensity AggressiveInteractions of Wintering White-throated Sparrows BARNEY A. SCHLINGER 527 Sexual Differences in Antipredator Behavior of BreedingAmerican Avocets and Black-necked Stilts TEX A. SORDAHL 530 Observations of AggressiveInteractions by Bald Eaglesof Known Age and Sex DAVID K. GARCELON 532 Clutch Size, Offspring Quality, and Female Survival in Tree Swallows-An Experiment DAVID A. WIGGINS 534 The Correct Spelling of HypoleucusReichenbach, 1852 DOUGLAS SIEGEL-CAUSEY 537 Geographic Variation in the Yellow-billed Cuckoo: Corrections and Comments RICHARD C. BANKS 538 BOOK REVIEWS ............................ 539 NEWS AND NOTES ........................... 541 Editor: MARTIN L. MORTON Assistant Editor: Book Review Editor: GILLIAN S. STEPHENS MARCY F. LAWTON INFORMATION FOR CONTRIBUTORS. Instructions on the preparation and submission of articles and other materials for this journal are given in The Condor 92:275-276 (February 1990). Contributors are urged to follow these instructions and the niceties of the journal’s style. Doing so will hasten publication, save money and effort, and gratify the editorial staff. I THIS PUBLICATION IS PRINTED ON ACID-FREE PAPER. I .