Acknowledgments

Specimens were examined from the American Museum of Natural History, Field Museum of Natural History, and Museum of Comparative Zoology. The Western Foundation of Vertebrate Zoology provided information on egg size, clutch size, and shell weight. Unpublished data and observations were provided by P. Bente, K. Bildstein, J. Brazil, P. Dunn, S. Hoffman, M. LaPage, B. McCaffery, C. McIntyre, The Peregrine Fund, Inc., K. Poole, G. Sanchez, C. Sandfort, P. Sherrington, J. Smith, L. Tuck, B. Walton, C. White, and P. Wrege. We thank R. Sutherland for assistance in gathering information from study skins, K. Sterner and B. McCaffery for recording vocalizations, and the staff of the Borror Laboratory of Bioacoustics, Ohio State University, for preparing sonograms. We also thank K. Poole, C. M. White, B. Walton, and J. Linthicum for helpful and thorough comments on the manuscript, and J. Schmitt for allowing inclusion of his excellent artwork.

TLB’s revisions were conducted while supported by a United States Environmental Protection Agency’s (EPA) Science to Achieve Results Graduate Fellowship. EPA has not officially endorsed this publication and the views expressed herein may not reflect the views of the EPA.