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

Osprey Population Trend in Washington

All statesGeneralists

Osprey in Washington has surged: up 346% on the route-weighted index since 1972.

+346%Since 1972
70Routes In State
51Years

Notable Osprey Trends in Washington

long arc increasecomputed index

Osprey has surged in Washington: up 345% on the route-weighted index since 1972.

Osprey Population Forecast in Washington

If the recent trend holds, Osprey in Washington is projected to rise about 46% by 2029 — from 0.35 in 2024 to a central estimate of 0.51 (95% range 0.35–0.67). A 5-year backtest shows a typical error of ±16.2%, with 100% of held-out values landing inside the 95% band.

+46%Change by 2029
0.51Projected 2029 index
0.35–0.6795% range
±16.2%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
20250.480.320.65
20260.490.330.65
20270.500.340.66
20280.510.340.67
20290.510.350.67

Osprey Survey Routes in Washington

Routes recording Osprey in Washington.
South Elma420241984
Packwood420181983
Nighthawk420241993
Ewan320192004
Laurier320221998
Yakima320241993
Ozette220062006
Taholah220221990
Selah220162006
Deception219971992
Bunker Hill220221979
Cougar220231976
Asotin220242024
Everett220152015
Prescott220192019
Scootney Reservoir220232017
Horn Rapids220242006
Mukilteo220061994
Moses Coulee220152015
Rainier220162004
Vashon Is.220182004
Carnation220241988
Mendota 3220232006
Port Angeles120051990
Warm Beach120121998

Osprey Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinaohiooregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

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