CONTENTS OF VOLUME 124 
NUMBER 1 
Major Articles 
1 The Northern Black Swift: migration path and wintering area revealed 
Jason P. Benson, Carolyn Gunn, Kim M. Potter, Robert A. Sparks, and James W. Fox 
9 Duration and rate of spring migration of Kirtlands Warblers 
DavidN. 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 fuse M. C. Da Silva 
24 Grassland bird community response to large wildfires 
Anthony J. Roberts, Clint W. Baal. David B. Wester, Sandra Rideout-Hanzak, and Heather A. Whit/aw 
31 Arthropod abundance and seasonal bird use of bottomland lorest harvest gaps 
Christopher E. Moorman, l.iessa I. Bowen, John C. Ki/go, Janies 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 l Pan 
51 Plasticity of habitat selection by Red-backed Shrikes ( Lanins coUurio) breeding in different landscapes 
Federico Morelli 
57 Territory distribution and habitat selection of the Serra Finch (Embernagra longicaudd) in Serra do Cipo, 
Brazil 
Guilherme H. S. Freitas and Marcos Rodrigues 
66 Foraging over Sargassum by 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. Piper 
81 Territorial fidelity to nectar sources by Purple-throated Caribs, Eulampis jugular is 
Vinita Gowda. Ethan J. Temelcs, and W. John Kress 
87 Breeding and foraging variation of the Plush-crested Jay (Cyanocorax chrysops) in the Brazilian 
Atlantic Forest 
Angelica Maria Kazue Uejinnt, Andrea Larissa Roesing, and Lutz dos Anjos 
96 Sexual selection and mating chronology of Lesser Prairie-Chickens 
Adam C. Behney, Blake A. Grisham, Clint W. Boat, Heather A. Whitlaw, and David A. Haukos 
106 Lek behavior of the Plovcrcrest ( Stephanoxis lalandi, Frochilidae) 
Marco Aurelia 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 
119 Reproductive life history traits of the Yellowish Pipit (Anthus lutescens ) 
Maikon S. Freitas and Mercival R. Francisco 
127 Nesting performance of Peregrine Falcons in Colorado, Montana, and Wyoming, 2005-2009 
James H. Enderson. Robert J. Oakleaf, Ralph R. Rogers, and Jay S. Sumner 
133 Reproductive success of the Creamy-bcllied Thrush in a southern temperate zone 
Andrea Astie and Natalia Luchesi 
139 Flange color differences of brood parasitic Brown-headed Cowbirds from nests of two host species 
Rebecca Croston, Christopher M. Tonra, Sacha K Heath, and Mark E. Hau ei 
146 Avian mortality associated with a volcanic gas seep at Kiska Island, Aleutian Islands, Alaska 
Alexander L. Bond, William C. Evans, and Ian L. Jones 
