BirdAnalyst
Species · BCR 5 · BBS 2025 Release · 1966–2024

Bewick's Wren In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestForest birds

Bewick's Wren in Northern Pacific Rainforest has increased: up 43% on the route-weighted index since 1970.

+43%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 →
102Routes In RegionSurvey 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 SignalsNotable 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 Bewick's Wren in Northern Pacific Rainforest. See the full index history below.

Bewick's Wren In Northern Pacific Rainforest Population Forecast

If the recent trend holds, Bewick's Wren in Northern Pacific Rainforest is projected to fall about 33% by 2029 — from 2.3 in 2024 to a central estimate of 1.6 (95% range 0.62–2.5). A 5-year backtest shows a typical error of ±17.2%, with 100% of held-out values landing inside the 95% band.

-33%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 →
1.6Projected 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 →
0.62–2.595% 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 →
±17.2%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 Northern Pacific Rainforest is projected to fall about 33% by 2029 — from 2.3 in 2024 to a central estimate of 1.6 (95% range 0.62–2.5). A 5-year backtest shows a typical error of ±17.2%, 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 →
20251.60.672.6
20261.60.662.6
20271.60.652.5
20281.60.632.5
20291.60.622.5

Routes In Northern Pacific Rainforest

Routes recording Bewick's Wren in Northern Pacific Rainforest.
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 →
MukilteoWASHINGTON222024
SalemOREGON202024
Mendota 3WASHINGTON152024
DaytonOREGON132024
TualatinOREGON122024
EverettWASHINGTON122024
McchordWASHINGTON122015
AdairOREGON102024
Vashon Is.WASHINGTON102024
Hazel CampOREGON92022
Mendota 2WASHINGTON92000
French GulchCALIFORNIA82010
Hay ForkCALIFORNIA82010
McminnvilleOREGON82022
Shasta LakeCALIFORNIA72024
UmpquaOREGON72024
South ElmaWASHINGTON72024
Mt ShastaCALIFORNIA62019
Warm BeachWASHINGTON52017
SelmaOREGON41997
IssaquahWASHINGTON41987
RaymondWASHINGTON42021
Bay ViewWASHINGTON42016
RainierWASHINGTON42018
Warm Beach 2WASHINGTON42024

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