1. Andrew C. Vallely, Dept. of Ornithology, American Museum of Natural History, New York, NY, 10024, USA, e-mail: .
2. Frederick Ertl, 318 Dewitt Mills Road, Kingston, NY, 12401, USA, e-mail: .
3. Thierry Garcia, Fundación Sumac Muyu, Quito, Ecuador, e-mail: