- Length: 6.25 inches
- Large, triangular head
- Dark face with indistinct eye ring
- Fairly large, dark bill
- Dark olive upperparts and sides
- White throat, center of breast, belly and undertail coverts
- White wing bars
- White rump feathers sometimes protrude over top of wings
- Juveniles have somewhat browner upperparts
- Often perches at the very top of a dead snag
- Commonly feeds by flying out to catch insects and returning to same
The Olive-sided Flycatcher is similar to pewees but has darker sides,
larger bill, and white patches above the wings (not always visible).
Empidonax flycatchers are much smaller.
Length and wingspan from: Robbins, C.S., Bruun, B., Zim, H.S., (1966). Birds of North America. New York: Western Publishing Company, Inc.