The author, and his acknowledgments

I am very grateful to Greg Budney, Curator, Laboratory of Natural Sounds, Cornell University, Ithaca, 159 Sapsucker Woods Road, Ithaca, NY 14850 for allowing me to use numerous recordings from the collection of the Laboratory of Natural Sounds. I am also indebted to Mrs. Andrea Priori, Carol Bloomgarden and Martha Fisher, of the Laboratory of Natural Sounds, who spent numerous hours of their valuable time to copy hundreds of vocalizations from the Library.

Thanks also to Paulo Boute, Edson Endrigo, Jeremy Minns and Luis Fabio Silveira, all from São Paulo, Brazil, and Juan Mazar Barnett, Argentina and Guy Kirwan, Great Britain, for making recorded vocalizations available for inclusion in this program and to Edson Endrigo and Dr. Karl Friedrich Müller, New York, for permission to use some of their excellent photographs.

For their accompaniment on my numerous field trips to the region thanks also to Mario Barroso Ramos Neto, São Paulo; Dr. Karl Friedrich Müller, New York; Dr. Edwin O. Willis, Departamento de Zoologia, Universidade Estadual de São Paulo, Rio Claro (SP); Luis Avelino Ribeiro, Fazenda Intervales; and Pedro Develey, São Paulo; I am also very grateful to Professors Dr. Tereza Kipnis and Dr. Dias da Silva for their generous hospitality which allowed me to stay at their houses in São Paulo and Ubatuba (SP), and to Acacio Senior and Gloria de Barros for their generous hospitality that made it possible to stay at their house in Petropolis (RJ).

Over the years I have received much help and suggestions from Dr. Raymond Paynter, Curator at the Museum of Comparative Zoology, Harvard University, Cambridge, MA. and I would also like to thank Dr. Paynter for allowing me access to the bird collection of the Museum of Comparative Zoology at Cambridge to study the skins and for the use of his extensive personal library on South American ornithology.

I would also offer additional thanks to Prof. Dr. Edwin O. Willis, Rio Claro who was an indispensable source of information concerning the birds of Estado São Paulo.

Finally thanks go to Dr. David Gibson of GG Software who designed and wrote the software used to display this work and provided much additional editing help and advice.

I am very grateful to Greg Budney, Curator, Laboratory of Natural Sounds, Cornell University, Ithaca, 159 Sapsucker Woods Road, Ithaca, NY 14850 for allowing me to use numerous recordings from the collection of the Laboratory of Natural Sounds. I am also indebted to Mrs. Andrea Priori, Carol Bloomgarden and Martha Fisher, of the Laboratory of Natural Sounds, who spent numerous hours of their valuable time to copy hundreds of vocalizations from the Library.

Thanks also to Paulo Boute, Edson Endrigo, Jeremy Minns and Luis Fabio Silveira, all from São Paulo, Brazil, and Juan Mazar Barnett, Argentina and Guy Kirwan, Great Britain, for making recorded vocalizations available for inclusion in this program and to Edson Endrigo and Dr. Karl Friedrich Müller, New York, for permission to use some of their excellent photographs.

For their accompaniment on my numerous field trips to the region thanks also to Mario Barroso Ramos Neto, São Paulo; Dr. Karl Friedrich Müller, New York; Dr. Edwin O. Willis, Departamento de Zoologia, Universidade Estadual de São Paulo, Rio Claro (SP); Luis Avelino Ribeiro, Fazenda Intervales; and Pedro Develey, São Paulo; I am also very grateful to Professors Dr. Tereza Kipnis and Dr. Dias da Silva for their generous hospitality which allowed me to stay at their houses in São Paulo and Ubatuba (SP), and to Acacio Senior and Gloria de Barros for their generous hospitality that made it possible to stay at their house in Petropolis (RJ).

Over the years I have received much help and suggestions from Dr. Raymond Paynter, Curator at the Museum of Comparative Zoology, Harvard University, Cambridge, MA. and I would also like to thank Dr. Paynter for allowing me access to the bird collection of the Museum of Comparative Zoology at Cambridge to study the skins and for the use of his extensive personal library on South American ornithology.

I would also offer additional thanks to Prof. Dr. Edwin O. Willis, Rio Claro who was an indispensable source of information concerning the birds of Estado São Paulo.

Finally thanks go to Dr. David Gibson of GG Software who designed and wrote the software used to display this work and provided much additional editing help and advice.

I am grateful to the staff of the Macaulay Library of Natural Sounds at the Cornell Laboratory of Ornithology, Ithaca, NY, for their generosity in allowing the incorporation of their vocalizations. Bob Grotke checked and repaired my tape recorder numerous times. Steve Pantle and especially Viviana Caro spent many hours copying vocalizations .

I am enormously grateful to Greg Budney, Director of the Macaulay Library of Natural Sounds, for hosting my visits to the Library and making it possible to use these wonderful vocalizations for this CD-ROM. I am grateful also for his enthusiastic encouragement, especially at the beginning of the project.

In addition, the following people contributed to the project by copying and sending many vocalizations and by giving vital advice: Jeremy Minns, Sao Paulo, Brazil; David Willis, London, UK; Guy Kirwan, Norwich, UK; Louis Fabio Silveira, Sao Paulo, Brazil; Paulo Boute, Cujaba, Brazil; Juan Mazar Barnett, Buenos Aires, Argentina; and Sjoerd Mayer, Enschede, Netherlands.

I am also grateful to Jeremiah Trimble, Curatorial Assistant in the Ornithology Department at he Museum of Comparative Zoology, Harvard University, and Douglas Causey, Senior Biologist at the Museum of Comparative Zoology, Harvard University, for allowing me to study the bird skins of the Museum.

I also would like to thank all the wonderful Brazilian people whose hospitality and help made traveling through Brazil so easy and interesting.

Finally David Gibson, Wrentham, MA, has spent many hours with upgrading The Birders Notebook and with editing to bring the CD-ROM into its present form. Clearly, without him this project would not have happened.