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

Cassin's Finch In Northern Rockies

All regionsNorthern RockiesForest birds

Cassin's Finch in Northern Rockies has edged down: down 15% on the route-weighted index since 1970.

-15%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 →
145Routes 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 Cassin's Finch in Northern Rockies. See the full index history below.

Cassin's Finch In Northern Rockies Population Forecast

If the recent trend holds, Cassin's Finch in Northern Rockies is projected to stay roughly flat through 2030, near 2.4 (95% range 0.07–4.6). A 5-year backtest shows a typical error of ±12.1%, with 100% of held-out values landing inside the 95% band.

+6%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 →
2.4Projected 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 →
0.07–4.695% 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 →
±12.1%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, Cassin's Finch in Northern Rockies is projected to stay roughly flat through 2030, near 2.4 (95% range 0.07–4.6). A 5-year backtest shows a typical error of ±12.1%, 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 →
20262.40.134.7
20272.40.114.7
20282.40.104.7
20292.40.084.7
20302.40.074.6

Routes In Northern Rockies

Routes recording Cassin's Finch 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 →
SilviesOREGON382024
Omak CreekWASHINGTON382024
Silver CreekOREGON362025
BarnhouseOREGON302025
Donelly 2OREGON272025
MonumentOREGON212025
CloverlandWASHINGTON192025
WallowaOREGON182025
DonnellyOREGON172006
OchocoOREGON161982
Mount VernonOREGON152024
Black Mtn.OREGON142004
Yellow PineIDAHO132016
Hash RockOREGON132025
UnityOREGON122025
Howard Mdws.OREGON112025
Hells CanyonOREGON112025
NewbridgeOREGON112025
Eagle CreekOREGON102025
Colter BayWYOMING91999
CascadeIDAHO81984
TroyOREGON82025
CoolinIDAHO72025
FloraOREGON72023
West ThumbWYOMING71982

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