The Acadian Flycatcher, Empidonax virescens, is a small insect-eating bird of the tyrant flycatcher family.

Adults have olive upperparts, darker on the wings and tail, with whitish underparts; they have a white eye ring, white wing bars and a wide bill. The breast is washed with olive. The upper part of the bill is dark; the lower part is yellowish.

Their breeding habitat is deciduous forests, often near water, across the eastern United States and southwestern Ontario. They make a loose cup nest in a horizontal fork in a tree or shrub.