Callan Cohen has been birding in Madagascar since 1999, and recently discovered the song of the mysterious Collared Nightjar that was long believed to be silent. He has led more than 150 tours and expeditions to 23 African countries, including Madagascar, for Birding Africa, a bird tour company he founded. He is also a research associate at the FitzPatrick Institute of African Ornithology and coauthor of the Southern African Birdfinder. Ken Behrens lived in Madagascar for over a decade, spending endless time in the field on his own and guiding many tours for Tropical Birding. He is the coauthor of many books, including Wildlife of Madagascar, Habitats of the World, and Habitats of Africa (all Princeton WILDGuides). He is the cohost of the popular podcast Naturally Adventurous.
