In a field site in Vietnam

My research has ranged from the social organization of manakins, systematics, stable isotope analyses for elucidating intra-breeding season movements of Sedge Wrens, and avian song rates and the implications for estimating populations. For over 30 years I have conducted avifaunal inventories throughout the world, especially in South America. These inventories have elucidated the distribution and status of many poorly-known species and have been used for delineating priority areas for the preservation of biological diversity. I have used behavioral (>4000 of my sound recordings are deposited at the Macaulay Library of Natural Sounds, Cornell University), genetic, and morphological data from these surveys to clarify relationships in a number of groups (e.g., woodpeckers, furnariids, Cistothorus wrens, Glaucidium pygmy-owls).