Michael Fogden (Ecuador, South America) and his wife Susan have spent the past 35 years as freelance writers and photographers. They have written 11 books and numerous articles, and in 2008 received a Lifetime Achievement Award from the North American Nature Photography Association. Marianne Taylor (Kent, UK) is a freelance writer, editor and illustrator. She has worked as editor for the bird book publisher Christopher Helm and a subeditor on the magazine Birdwatch.  Sheri L. Williamson (Arizona, USA) is an ornithologist, award-winning writer, and author of A Field Guide to Hummingbirds of North America. Since 1996, she has worked as director of the Southeastern Arizona Bird Observatory. .