Acadian Flycatcher
Empidonax virescens

The Acadian Flycatcher and its relatives in the genus Empidonax are difficult to distinguish, but in much of the South the Acadian is the only breeding species; between June and August, any Empidonax seen in the lowlands south of New Jersey and Missouri can safely be called an Acadian.

description 6" (15 cm). Olive green above, whitish or sometimes yellow below (especially on flanks and belly), with distinct white eye ring. Identified chiefly by voice and habitat.