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

Bewick's Wren Population Trend in Oregon

All statesForest birds

Bewick's Wren in Oregon has risen sharply: up 72% on the route-weighted index since 1970.

+72%Since 1970TrendPercent 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 →
57Routes 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 →
56YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Bewick's Wren Trends in OregonNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Bewick's Wren has risen sharply in Oregon: up 72% on the route-weighted index since 1970.

Bewick's Wren Population Forecast in Oregon

If the recent trend holds, Bewick's Wren in Oregon is projected to stay roughly flat through 2029, near 1.1 (95% range 0.54–1.7). A 5-year backtest shows a typical error of ±22.1%, with 100% of held-out values landing inside the 95% band.

+8%Change by 2029TrendPercent 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 →
1.1Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.54–1.795% 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 →
±22.1%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, Bewick's Wren in Oregon is projected to stay roughly flat through 2029, near 1.1 (95% range 0.54–1.7). A 5-year backtest shows a typical error of ±22.1%, with 100% of held-out values landing inside the 95% band.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 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 →
20251.10.511.6
20261.10.521.6
20271.10.531.6
20281.10.541.6
20291.10.541.7

Bewick's Wren Survey Routes in Oregon

Routes recording Bewick's Wren in Oregon.
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 →
Salem2020241993
Dayton1320241988
Tualatin1220241968
Modoc Point1020141971
Adair1020241971
Hazel Camp920221976
Mcminnville820221994
Umpqua720241968
Modoc Point 2620242024
Selma419971993
Winberry320231968
Emigrant Lake 2320242007
Scio320241972
Canby320241993
Waldport319991994
Newbridge320242024
Timber220171972
Santiam220241994
Salado220111968
Wedderburn220241970
Derby219931970
Elkton220241972
Green220241995
Shellrock120192019
Sandy River119991995

Bewick's Wren Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoidahoillinoisindianaiowakansaskentuckymarylandmississippimissourinevadanew-mexiconorth-carolinaohiooklahomapennsylvaniatennesseetexasutahvirginiawashingtonwest-virginiawisconsinwyoming

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