Head to head
Eastern Wood-Pewee vs Olive-Sided Flycatcher
An eastern wood-pewee and an olive-sided flycatcher are both members of the genus Contopus known for their distinctive whistled songs, yet the two differ meaningfully in perch choice, migration distance, and conservation trajectory.
| Eastern Wood-Pewee | Olive-Sided Flycatcher | |
|---|---|---|
| Scientific name | Contopus virens | Contopus cooperi |
| Song | Slow, plaintive "pee-a-wee" | Whistled "quick-three-beers" |
| Preferred perch height | Mid-level forest branches | The very top of the tallest dead snag |
| Breeding habitat | Deciduous and mixed forest | Boreal and mountain conifer forest |
| Winter range | South America | As far south as the Andes |
| Migration distance | Long | Among the longest of any NA flycatcher |
| Population trend | Gradually decreasing | Significantly decreasing |
| Conservation status | Least Concern | Near Threatened |
Eastern Wood-Pewee vs Olive-Sided Flycatcher: common questions
How can you tell an eastern wood-pewee from an olive-sided flycatcher by song?
The eastern wood-pewee sings a slow, plaintive, drawn-out call rendered as "pee-a-wee," while the olive-sided flycatcher produces a sharper, more clipped whistle widely rendered as "quick-three-beers," two distinctly different songs that make voice a reliable way to separate the two Contopus relatives.
Why does the olive-sided flycatcher perch so much higher than the eastern wood-pewee?
The olive-sided flycatcher characteristically chooses the very top of the tallest available dead snag to scan a wide area for insects, while the eastern wood-pewee is content perching at a more moderate mid-level height within the forest canopy, a difference in hunting strategy between the two closely related species.
Which of these two flycatchers is more at risk?
The olive-sided flycatcher has suffered a considerably steeper population decline, linked to logging of its boreal forest breeding habitat and habitat loss on its Andean wintering grounds, earning it a Near Threatened status, while the eastern wood-pewee's decline has been more gradual and it remains classified as Least Concern.