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

Wrentit Population Trend in Oregon

All statesForest birds

Wrentit in Oregon has surged: up 112% on the route-weighted index since 1971.

+112%Since 1971TrendPercent 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 →
34Routes 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 Wrentit 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 →

Wrentit has surged in Oregon: up 112% on the route-weighted index since 1971.

Wrentit Population Forecast in Oregon

If the recent trend holds, Wrentit in Oregon is projected to stay roughly flat through 2030, near 0.76 (95% range 0.29–1.2). A 5-year backtest shows a typical error of ±8.4%, with 100% of held-out values landing inside the 95% band.

+7%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 →
0.76Projected 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 →
0.29–1.295% 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 →
±8.4%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, Wrentit in Oregon is projected to stay roughly flat through 2030, near 0.76 (95% range 0.29–1.2). A 5-year backtest shows a typical error of ±8.4%, 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 →
20260.750.271.2
20270.750.281.2
20280.760.281.2
20290.760.281.2
20300.760.291.2

Wrentit Survey Routes in Oregon

Routes recording Wrentit 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 →
Elkton2620251973
Fisher1820101997
Klickitat Mt1519961993
Coquille920251994
Hazel Camp720221975
Umpqua620251980
Hauser519851970
Wedderburn520251970
Barnes Val519721971
Harlan 2420252011
Lobster Creek420252025
Green420251994
Lorane420251994
Cinderella420252023
Nicolai Mtn.320242004
Waldport320011994
Harlan220092008
Glasgow220251986
Riley Peak120152008
Santiam120192012
Salado120251968
Winberry120191998
Days Creek120251972
Derby119831983
Emigrant Lake 2120212008

Wrentit Population Trend in Other States

california

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