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

Brown Creeper Population Trend in Oregon

All statesForest birds

Brown Creeper in Oregon has risen sharply: up 73% on the route-weighted index since 1970.

+73%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 →
98Routes 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 Brown Creeper 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 →

Brown Creeper has risen sharply in Oregon: up 72% on the route-weighted index since 1970.

Brown Creeper Population Forecast in Oregon

If the recent trend holds, Brown Creeper in Oregon is projected to fall about 29% by 2030 — from 1.6 in 2025 to a central estimate of 1.1 (95% range 0.67–1.6). A 5-year backtest shows a typical error of ±23.6%, with 80% of held-out values landing inside the 95% band.

-29%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 →
0.67–1.695% 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 →
±23.6%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, Brown Creeper in Oregon is projected to fall about 29% by 2030 — from 1.6 in 2025 to a central estimate of 1.1 (95% range 0.67–1.6). A 5-year backtest shows a typical error of ±23.6%, with 80% 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 →
20261.10.621.6
20271.10.631.6
20281.10.641.6
20291.10.651.6
20301.10.671.6

Brown Creeper Survey Routes in Oregon

Routes recording Brown Creeper 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 →
Clearwater1620251991
Nicolai Mtn.1420251995
Cinderella1420251993
Barnes Val1319871972
Ruch1220251997
Garfield820251987
Myrtle Grove820241993
Winberry620231969
Whiskey Spg.620151993
Silvies620242004
Selma620251994
Harlan620082006
Fisher620101997
Shellrock520241969
Mount Vernon520242016
Picture Flat520251993
Sandy River520061993
Adair420231974
Dayton420251987
Glasgow420241995
Coquille420251996
Bald Mtn.420251995
Klickitat Mt419951993
Scappoose420252010
Harlan 2420252011

Brown Creeper Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahoillinoisindianaiowamainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiopennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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