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Species · BCR 5 · BBS 2026 Release · 1966–2025

Wilson's Warbler In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestForest birds

Wilson's Warbler in Northern Pacific Rainforest has edged down: down 12% on the route-weighted index since 1970.

-12%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 →
158Routes 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 →
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 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 Wilson's Warbler in Northern Pacific Rainforest. See the full index history below.

Wilson's Warbler In Northern Pacific Rainforest Population Forecast

If the recent trend holds, Wilson's Warbler in Northern Pacific Rainforest is projected to rise about 21% by 2030 — from 10 in 2025 to a central estimate of 12 (95% range 8.3–16). A 5-year backtest shows a typical error of ±8.7%, with 100% of held-out values landing inside the 95% band.

+21%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 →
12Projected 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 →
8.3–1695% 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 →
±8.7%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, Wilson's Warbler in Northern Pacific Rainforest is projected to rise about 21% by 2030 — from 10 in 2025 to a central estimate of 12 (95% range 8.3–16). A 5-year backtest shows a typical error of ±8.7%, 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 →
2026128.216
2027128.216
2028128.316
2029128.316
2030128.316

Routes In Northern Pacific Rainforest

Routes recording Wilson's Warbler 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 →
Copper RiverALASKA1362011
FisherOREGON852010
Klickitat MtOREGON731996
Yakutat (Short)ALASKA611984
WaldportOREGON612001
HainesALASKA592025
Raymond 2WASHINGTON562024
YakutatALASKA542025
Thompson PasALASKA512025
CordovaALASKA492024
Sheep MtnALASKA492025
OzetteWASHINGTON472025
Redwood N.P.CALIFORNIA462010
Redwood N.P. 2CALIFORNIA432013
Harlan 2OREGON432025
Chichagof IsALASKA412024
SvensenOREGON411992
Trask SummitOREGON372024
Fisher 2OREGON372025
SaladoOREGON362025
HarlanOREGON322009
RaymondWASHINGTON312021
SitkaALASKA292024
Fish RockCALIFORNIA282014
MendotaWASHINGTON271988

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