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

Evening Grosbeak In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestGeneralists

Evening Grosbeak in Northern Pacific Rainforest has declined: down 37% on the route-weighted index since 1970.

-37%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 →
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 Evening Grosbeak in Northern Pacific Rainforest. See the full index history below.

Forecast

If the recent trend holds, Evening Grosbeak in Northern Pacific Rainforest is projected to stay roughly flat through 2029, near 1.3 (95% range 0.00–3.1). A 5-year backtest shows a typical error of ±36%, with 100% of held-out values landing inside the 95% band.

-8%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 →
1.3Projected 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 →
0.00–3.195% 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 →
±36%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 2029, near 1.3 (95% range 0.00–3.1). A 5-year backtest shows a typical error of ±36%, 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 →
20251.40.003.1
20261.40.003.1
20271.30.003.1
20281.30.003.1
20291.30.003.1

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
Harlan 2OREGON292024
Klickitat MtOREGON261996
TimberOREGON152017
HarlanOREGON142009
NeiltonWASHINGTON131975
Nicolai Mtn.OREGON112024
Trask SummitOREGON112024
LoraneOREGON82024
Mt RainierWASHINGTON82015
Raymond 2WASHINGTON82024
WinberryOREGON72023
ScioOREGON72022
Fisher 2OREGON72024
Mendota 2WASHINGTON72000
WaldportOREGON61999
Mt. AdamsWASHINGTON62024
ElktonOREGON52023
GazelleCALIFORNIA41989
ProspectOREGON41993
PackwoodWASHINGTON42024
Hurricane RgWASHINGTON42024
Mt St HelensWASHINGTON42024
GreenwaterWASHINGTON42023
YrekaCALIFORNIA31998

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