BirdAnalyst
Species · Oregon · BBS 2025 Release · 1966–2024

Willow Flycatcher Population Trend in Oregon

All statesAerial insectivores

Willow Flycatcher in Oregon has collapsed: down 78% on the route-weighted index since 1970.

-78%Since 1970
98Routes In State
56Years

Notable Willow Flycatcher Trends in Oregon

long arc declinecomputed index

Willow Flycatcher has collapsed in Oregon: down 78% on the route-weighted index since 1970.

Willow Flycatcher Population Forecast in Oregon

If the recent trend holds, Willow Flycatcher in Oregon is projected to fall about 64% by 2029 — from 1.8 in 2024 to a central estimate of 0.64 (95% range 0.00–2.8). A 5-year backtest shows a typical error of ±60.1%, with 100% of held-out values landing inside the 95% band.

-64%Change by 2029
0.64Projected 2029 index
0.00–2.895% range
±60.1%Backtest error
19682029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.940.003.1
20260.860.003.0
20270.790.003.0
20280.710.002.9
20290.640.002.8

Willow Flycatcher Survey Routes in Oregon

Routes recording Willow Flycatcher in Oregon.
Fish Lake3420241974
Lorane2220241994
Santiam2020241994
Garfield1520231974
Svensen1419921990
Joseph1220241971
Molalla1220241994
Nicolai Mtn.1120241993
Fisher1020101997
Sandy River1020061993
Scio920241971
Donnelly919951995
Bridgeport820221986
Harlan 2820242011
Blitzen719721971
Pendleton720241978
Umpqua620241968
Timber520171968
Elkton520241972
Bull Run520102007
Glasgow420231990
Troy419971992
Riley Peak420162007
Zumwalt420051995
Cool Camp320131968

Willow Flycatcher Population Trend in Other States

alaskaarizonaarkansascaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.