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

Bewick's Wren Population Trend in Oregon

All statesForest birds

Bewick's Wren in Oregon has risen sharply: up 60% on the route-weighted index since 1970.

+60%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 →
61Routes 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 →
57YearsYears 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 60% 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 2030, near 1.1 (95% range 0.56–1.7). A 5-year backtest shows a typical error of ±18.4%, with 100% of held-out values landing inside the 95% band.

+2%Change 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 →
1.1Projected 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 →
0.56–1.795% 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 →
±18.4%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 2030, near 1.1 (95% range 0.56–1.7). A 5-year backtest shows a typical error of ±18.4%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20261.10.531.6
20271.10.531.6
20281.10.541.6
20291.10.551.6
20301.10.561.7

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 →
Tualatin1720251968
Salem1720251993
Umpqua1220251968
Modoc Point1020141971
Hazel Camp920221976
Garfield820251976
Dayton720251988
Scappoose520251995
Canby520251993
Santiam420251994
Adair420251971
Sparta420252025
Green420251995
Selma419971993
Winberry320231968
Emigrant Lake 2320252007
Waldport319991994
Modoc Point 2220252024
Timber220171972
Salado220111968
Derby219931970
Harlan 2220252021
Scio220251972
Elkton220251972
Wallowa220252025

Bewick's Wren Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoidahoillinoisindianaiowakansaskentuckymarylandmississippimissourinevadanew-mexiconorth-carolinaohiooklahomapennsylvaniatennesseetexasutahvirginiawashingtonwest-virginiawisconsinwyoming

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