Harold F. Greeney is a natural historian, 2015 Guggenheim Fellow and the creator of the Yanayacu Biological Station & Center for Creative studies in Ecuador. He has a particular interest in antpittas and gnateaters, for which he has described the first nests of several species, and is an active and regular contributor to the ornithological and entomological literature.David Beadle is an artist from Canada with a great knowledge of South America and her birds. His previous books include New World Warblers (Helm, 2002) and Sparrows of the United States and Canada (Academic Press, 2002).