ognizant Communication Corporation

VOLUME 13, NUMBER 2, 2000

Responses of Scissor-Tailed Flycatchers (Tryannus forficatus) to Experimental Cowbird Parasitism
Brian D. Peer and Spencer G. Sealy

Simulated Host Activity Does Not Attract Parasitism by Brown-Headed Cowbirds (Molothrus ater)
Paula M. Grieef and Spencer G. Sealy

Orientation of Perching Birds When the Sun Is at Low Elevation
Michael J. Justice, Teresa C. Justice, and Kimberly C. Joyner

Recovery of Cached Food by Blue Jays (Cyanocitta cristata)
Paul Alexander Callo and Curtis S. Adkisson

Variation in the Bout Structure of Northern Mockingbird (Mimus polyglottus) Singing
Nicholas S. Thompson, Emily Abbey, Jessica Wapner, Cheryl Logan, Peter G. Merritt, and Albert Pooth

Nest Site Selection in Monk Parakeets (Myiopsitta monachus) in Florida
Joanna Burger and Michael Gochfeld

Reviewer Acknowledgments

Volume 13 Subject and Author Index

VOLUME 13, NUMBER 1, 1999

Aggressive Responses of Red-Winged Blackbirds (Agelaius phoeniceus) Toward Brown-Headed Cowbirds (Molothrus alter) in Areas of Recent and Long-Term Sympatry
John W. Prather, Catherine P. Ortega, and Alexander Cruz

Discrimination of Gargle Calls by Black-Capped Chickadees (Poecile atricapillus)
Lori E. Miyasato and Myron C. Baker

Seasonal Variation in Hatching Spreads in Mountain Blueburds (Sialia currucoides): A Test of the Nest Failure Hypothesis
Percy N. Hébert

Role of Human Disturbance in Response Behavior of Laysan Albastrosses (Diomedea immutabilis)
Joanna Burger and Michael Gochfeld

Head Movement and Vision in Underwater-Feeding Birds of Stream, Lake, and Seashore
Lee W. Casperson

The Influence of Social Context on the Vocalizations of Mallard Ducklings (Anas platyrhynchos)
Gloria M. Hicinbothom and David B. Miller

Reviewer Acknowledgements

Books Received