Noel F. R. Snyder is a retired field biologist formerly with the U.S. Fish and Wildlife Service and with Wildlife Preservation Trust International. He is an author of many books, including The Carolina Parakeet: Glimpses of a Vanished Bird, The California Condor: A Saga of Natural History and Conservation, Raptors of North America: Natural History and Conservation, The Parrots of Luquillo: Natural History and Conservation of the Puerto Rican Parrot, and Parrots: Status Survey and Conservation Action Plan 2000-2004.

David E. Brown is a research scientist affiliated with Arizona State University. His publications include The Grizzly in the Southwest, The Wolf in the Southwest, Arizona Game Birds, Arizona Wetlands and Waterfowl, and Borderland Jaguars.

Kevin B. Clark is a former U.S. Fish and Wildlife Service biologist who worked on the recovery of endangered species such as the California Gnatcatcher and California Least Tern and was regional recovery coordinator for the threatened Western Snowy Plover. He now works as a freelance biologist who conducts endangered species surveys and monitoring for government agencies and private companies.