James Luther Davis is a naturalist for Metro Regional Parks and Greenspaces and formerly served as education director for the Audubon Society of Portland. He grew up chasing lizards in the Sonoran Desert, gong on to earn a master's degree in zoology from Colorado State University. He taught at Marylhurst University where he helped start the Head Start Summer Science Institute. During this time he wrote this book's predecessor, Seasonal Guide to the Natural Year: Oregon, Washington, and British Columbia (1996). He also contributed to Wild in the City: A Guide to Portland's Natural Areas. Davis and his wife, Sally, live in Portland. When not pursuing his natural history interests, he plays guitar in rock and roll bands, although not nearly enough these days.