BirdAnalyst
Species · BCR 10 · BBS 2026 Release · 1966–2025

American Goldfinch In Northern Rockies

All regionsNorthern RockiesForest birds

American Goldfinch in Northern Rockies has edged down: down 22% on the route-weighted index since 1970.

-22%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 →
164Routes 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 American Goldfinch in Northern Rockies. See the full index history below.

American Goldfinch In Northern Rockies Population Forecast

If the recent trend holds, American Goldfinch in Northern Rockies is projected to fall about 26% by 2030 — from 1.3 in 2025 to a central estimate of 0.99 (95% range 0.31–1.7). A 5-year backtest shows a typical error of ±39.1%, with 100% of held-out values landing inside the 95% band.

-26%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 →
0.99Projected 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 →
0.31–1.795% 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 →
±39.1%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, American Goldfinch in Northern Rockies is projected to fall about 26% by 2030 — from 1.3 in 2025 to a central estimate of 0.99 (95% range 0.31–1.7). A 5-year backtest shows a typical error of ±39.1%, 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 →
20261.00.341.7
20271.00.331.7
20281.00.331.7
20290.990.321.7
20300.990.311.7

Routes In Northern Rockies

Routes recording American Goldfinch in Northern Rockies.
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 →
ClintonMONTANA181973
MeeteetseWYOMING152025
GrangevilleIDAHO141987
Muddy CreekMONTANA142015
Heart ButteMONTANA112025
CodyWYOMING112025
Wolf CreekMONTANA102022
OttoWYOMING102025
AugustaMONTANA92025
Twin BridgesMONTANA81974
Willow Creek 2MONTANA82025
East Glacier ParkMONTANA82025
RiversideWYOMING82025
SweetwaterWYOMING82009
AlturasIDAHO71968
CabartonIDAHO72024
Church HillMONTANA72025
CentervilleIDAHO62025
Hells CanyonOREGON62022
Deer ParkWASHINGTON62015
Buckskin MtnWYOMING62017
LeoWYOMING62025
Clyde ParkMONTANA52025
GreenoughMONTANA52003
Silver CreekOREGON51990

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