BirdAnalyst
Species · Washington · BBS 2026 Release · 1966–2025

Barred Owl Population Trend in Washington

All statesBirds of prey

Barred Owl in Washington has surged: up 171% on the route-weighted index since 1994.

+171%Since 1994TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
32Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
30YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Barred Owl Trends in WashingtonNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Barred Owl in Washington. See the full index history below.

Barred Owl Population Forecast in Washington

If the recent trend holds, Barred Owl in Washington is projected to stay roughly flat through 2030, near 0.06 (95% range 0.02–0.11). A 5-year backtest shows a typical error of ±75.3%, with 80% of held-out values landing inside the 95% band.

n/aChange by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.06Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.02–0.1195% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±75.3%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Barred Owl in Washington is projected to stay roughly flat through 2030, near 0.06 (95% range 0.02–0.11). A 5-year backtest shows a typical error of ±75.3%, with 80% of held-out values landing inside the 95% band.19912030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20260.060.010.10
20270.060.010.11
20280.060.010.11
20290.060.020.11
20300.060.020.11

Barred Owl Survey Routes in Washington

Routes recording Barred Owl in Washington.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Rimrock220002000
Glacier220232006
Mt St Helens220241998
Mazama220192019
L. Wenatchee220112004
Newhalem120241994
Montesand120242024
Cascade Riv119931991
Keller119911991
Deception119931993
Kamilche120192019
Vashon Is.120192003
E. Mt. Adams120132013
Cougar120232023
Kendall120252007
Leavenworth120072007
South Elma120182005
Packwood120232016
Index 2120232023
White Chuck120252021
Carlton120192019
Cedar Falls120121995
Raymond120212021
Mt Rainier120142000
Suiattle Riv120021995

Barred Owl Population Trend in Other States

alabamaalaskaarkansascaliforniaconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawest-virginiawisconsin

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.