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

Wilson's Warbler In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestForest birds

Wilson's Warbler in Northern Pacific Rainforest has held roughly steady: down 5% on the route-weighted index since 1970.

-5%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 →
157Routes 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 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 stay roughly flat through 2029, near 13 (95% range 8.5–17). A 5-year backtest shows a typical error of ±5.6%, with 100% of held-out values landing inside the 95% band.

-6%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 →
13Projected 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 →
8.5–1795% 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 →
±5.6%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, Wilson's Warbler in Northern Pacific Rainforest is projected to stay roughly flat through 2029, near 13 (95% range 8.5–17). A 5-year backtest shows a typical error of ±5.6%, 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 →
2025128.316
2026128.416
2027128.417
2028128.417
2029138.517

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
Thompson PasALASKA672024
Yakutat (Short)ALASKA611984
WaldportOREGON612001
OzetteWASHINGTON592024
HainesALASKA562024
Raymond 2WASHINGTON562024
Harlan 2OREGON542024
CordovaALASKA492024
Redwood N.P.CALIFORNIA462010
Sheep MtnALASKA442017
Redwood N.P. 2CALIFORNIA432013
Chichagof IsALASKA412024
SvensenOREGON411992
Nicolai Mtn.OREGON412024
SaladoOREGON372024
Trask SummitOREGON372024
Pe EllWASHINGTON372023
HarlanOREGON322009
Fisher 2OREGON312024
RaymondWASHINGTON312021
YakutatALASKA302024
SitkaALASKA292024

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