The Wilson Journal of Ornithology 
(formerly The Wilson Bulletin) 
Volume 124, Number 1 CONTENTS March 2012 
Major Articles 
1 The Northern Black Swift: migration path and wintering area revealed 
Jason R Reason . Carolyn Gunn, Kim M. Potter, Robert A. Sparks, and James W. Fox 
9 Duration and rate of spring migration of Kirtland's Warblers 
David N. Ewert, Kimberly R. Hall, Joseph M. Wunderle Jr., Dave Currie, Sarah M. Rockwell. 
Scott B. Johnson, and Jennifer D. White 
15 A new area of endemism for Amazonian birds in the Rio Negro Basin 
Sergio H. Borges and Josi M. C. Da Silva 
24 Grassland bird community response to large wildfires 
Anthony J. Roberts, Clint W. Boal, David B. Wester, Sandra Rideout-Hanzak, and Heather A. Whitlaw 
31 Arthropod abundance and seasonal bird use of bottomland forest harvest gaps 
Christopher E. Moorman, Liessa T. Bowen, John C. Kilgo, James L. Hanula, Scott Horn, and 
Michael D. Ulyshen 
40 Seasonal variation in shorebird abundance in the State of Rio Grande do Sul, southern Brazil 
Angelo L Scherer and Maria V. Retry 
51 Plasticity of habitat selection by Red-backed Shrikes ( Lanins collurio) breeding in different landscapes 
Federico Morelli 
57 Territory distribution and habitat selection of the Serra Finch ( Embernagra longicauda) in Serra do 
Cip6, Brazil 
Guilherme H. S. Freitas and Marcos Rodrigues 
66 Foraging over Sargassum bv western North Atlantic seabirds 
Mary L. Moser and David S. Lee 
73 Male Common Loons signal greater aggressive motivation by lengthening territorial yodels 
John N. Mager III, Charles Walcott, and Walter H. Riper 
81 Territorial fidelity to nectar sources by Purple-throated Caribs, Eulampis jugularis 
Vinita Gowda, Ethan J. Temeles, and W. John Kress 
87 Breeding and foraging variation of the Plush-crested Jay (Cyanocorax chrysops) in the Brazilian 
Atlantic Forest 
Angelica Maria Kazue Uejima, Andrea Larissa Boesing, and Luiz dos Anjos 
96 Sexual selection and mating chronology of Lesser Prairie-Chickens 
Adam C. Behney, Blake A. Grisham, Clint W. Boal, Heather A. Whitlaw, and David A. Haukos 
106 Lek behavior of the Plovercrest ( Stephanoxis labtndi, Trochilidae) 
Marco Aurelio Pizo 
113 Nest survival, phenology, and nest-site characteristics of Common Nighthawks in a New Jersey Pine 
Barrens grassland 
Michael C. Allen and Kimberly A. Peters 
Continued on inside back cover 
