Iain Campbell is the coauthor of Birds of Australia and Wildlife of Australia (both Princeton), and a professional nature Guide and tropical landscape geochemist.
Behrens is a coauthor of Birds of Kruger National Park and Wildlife of Madagascar (both Princeton WILD Guides.
Ken Behrens, Charley Hesse, and Phil Chaon are professional nature guides.
Iain Campbell is the coauthor of Birds of Australia and Wildlife of Australia (both Princeton), and a professional nature Guide and tropical landscape geochemist