Sheri L. Williamson is a lifelong naturalist, co-founder and co-director of the Southeastern Arizona Bird Observatory, and author of A Field Guide to Hummingbirds of North America in the Peterson Field Guide Series. She lives near the Mexican border in Bisbee, Arizona with her husband and colleague Tom Wood and their dependents: a geriatric parrot, a rescue dog, three pampered pet chickens, and hundreds of freeloading wild birds.