Summary: Sheri 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.
Summary: Sheri 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.