Author Affiliations +
Barry Walker,* Douglas F. Stotz,** Tatiana Pequeño,*** John W. Fitzpatrick****
*Director, Manu Expeditions, P.O. Box 606, Cusco, Perú
**Conservation Ecologist, Environmental and Conservation Programs, The Field Museum, 1400 South Lake Shore Drive, Chicago, IL 60605-2496, U.S.A.
***Biólogo, Calle Federico Gerdes 141, San Miguel, Lima, Perú
****Director, Cornell Laboratory of Ornithology, Cornell University, 159 Sapsucker Woods Road, Ithaca, NY 14850, U.S.A.