Murray E. Fowler, DVM, is professor emeritus of zoological medicine in the School of Veterinary Medicine at the University of California, Davis. He is an award-winning author and teacher, as well as a diplomate of the American College of Zoological Medicine, the American Board of Veterinary Toxicology, and the American College of Veterinary Internal Medicine.

Zalmir S. Cubas, DVM, is director of the Department of Environment and a veterinarian for the Tres Fronteiras Conservation and Breeding Center, Iguacy Falls, Brazil. He is also developing a private zoo devoted to conservation of South American species in Brazil.