Donald and Lilian Stokes are widely recognized as America's foremost authorities on birds and nature. They are the hosts of the PBS series BirdWatch with Don and Lilian Stokes. Their books include the bestselling Stokes Field Guide to Birds (Eastern and Western editions). Kim Williams and Rob Mies are leading authorities in bat conservation throughout North America and founded the Organization for Bat Conservation. They have collectively authored more than 17 publications on bats.