Field Guide to North American Flycatchers: Empidonax and Pewees

Princeton University Press’s Field Guide to North American Flycatchers: Empidonax and Pewees is definitely geared towards more serious birders. It includes the highly similar Empidonax flycatcher family as well as four pewees and Olive-Sided Flycatcher. The guide is split into two parts: How to Use the Guide and the Field Guide proper. How to Use

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