1. Jeffrey S. Marks, Montana Bird Advocacy, Missoula, Montana 59802, USA, e-mail: .
2. Robert Zirl and Cynthia Hudson, Alberton, Montana 59820, USA.
3. Ramiro Yabar, Cusco, Peru.
4. Arthur Monteiro Gomes, Instituto Nacional de Pesquisas da Amazônia, Departamento de Ecologia, Manaus, Brazil.
5. Harold F. Greeney, Yanayacu Biological Station & Center for Creative Studies, Quito, Ecuador.