1. Department of Ornithology, The Academy of Natural Sciences of Drexel University, Philadelphia, PA 19103, USA.
2. Department of Ornithology, American Museum of Natural History, New York, NY 10028, USA.
3. Department of Biology, City College of New York, New York, NY 10031, USA.
4. Graduate Center, City University of New York, New York, NY 10016, USA.
5. Department of Biology, University of Louisiana at Lafayette, Lafayette, LA 70503, USA.
6. Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA.
7. Museum of Natural Science, Louisiana State University, Baton Rouge, LA 70803, USA.
8. Finnish Museum of Natural History of Helsinki, University of Helsinki, Helsinki, Finland.
9. Museu Paraense Emílio Goeldi, Belém, Brazil.
10. Instituto Tecnológico Vale, Belém, Brazil.
11. Instituto Nacional de Pesquisas da Amazônia, INPA, Manaus, Brazil.