Acadian flycatcher

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. This bird's song is an explosive peet-sa. The call is a soft peet. They also have a call similar to that of the northern flicker. A unique two-note song described as "ka-zeep" helps to identify this species.

Measurements:

Length: 5.5–5.9 inches (14–15 cm)

Weight: 0.4–0.5 ounces (11–14 g)

Wingspan: 8.7–9.1 inches (22–23 cm)