Les Beletsky is a professional wildlife biologist and university zoology teacher. Prior to taking up writing wildlife guides he conducted many years of field research on the ecology and behavior of birds. He is the author of numerous books, including Costa Rica, Belize, Ecuador, and Peru in this series.

David L. Pearson is a research professor in the School of Life Sciences at Arizona State University. He is co-author of The New Key to Ecuador and the Galapagos and of Ecuador in this series. Les Beletsky is a professional wildlife biologist and former university zoology teacher. Prior to taking up writing wildlife guides, he conducted many years of field research into the ecology and behavior of birds. He is the author of numerous books, including Costa Rica, Ecuador, and Peru in this series.