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

Evening Grosbeak In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestForest birds

Evening Grosbeak in Northern Pacific Rainforest has declined: down 49% on the route-weighted index since 1970.

-49%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 →
99Routes 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 Evening Grosbeak in Northern Pacific Rainforest. See the full index history below.

Evening Grosbeak In Northern Pacific Rainforest Population Forecast

If the recent trend holds, Evening Grosbeak in Northern Pacific Rainforest is projected to stay roughly flat through 2030, near 1.3 (95% range 0.00–3.1). A 5-year backtest shows a typical error of ±34.1%, with 100% of held-out values landing inside the 95% band.

+3%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 →
1.3Projected 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 →
0.00–3.195% 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 →
±34.1%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, Evening Grosbeak in Northern Pacific Rainforest is projected to stay roughly flat through 2030, near 1.3 (95% range 0.00–3.1). A 5-year backtest shows a typical error of ±34.1%, 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 →
20261.40.003.1
20271.30.003.1
20281.30.003.1
20291.30.003.1
20301.30.003.1

Routes In Northern Pacific Rainforest

Routes recording Evening Grosbeak 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 →
FisherOREGON1332010
Klickitat MtOREGON261996
Harlan 2OREGON222025
TimberOREGON152017
HarlanOREGON142009
NeiltonWASHINGTON131975
SaladoOREGON122025
Trask SummitOREGON112024
LoraneOREGON82025
Mt RainierWASHINGTON82015
Raymond 2WASHINGTON82024
WinberryOREGON72023
ScioOREGON72022
Mendota 2WASHINGTON72000
Nicolai Mtn.OREGON62025
WaldportOREGON61999
GreenwaterWASHINGTON62025
Fisher 2OREGON52025
KamilcheWASHINGTON52025
Mt. AdamsWASHINGTON52025
GazelleCALIFORNIA41989
ProspectOREGON41993
PackwoodWASHINGTON42024
YrekaCALIFORNIA31998
ShellrockOREGON32022

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