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Species · BCR 10 · BBS 2025 Release · 1966–2024

Cassin's Finch In Northern Rockies

All regionsNorthern RockiesGeneralists

Cassin's Finch in Northern Rockies has held roughly steady: down 4% on the route-weighted index since 1970.

-4%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 →
144Routes 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 Cassin's Finch in Northern Rockies. See the full index history below.

Forecast

If the recent trend holds, Cassin's Finch in Northern Rockies is projected to fall about 14% by 2029 — from 2.8 in 2024 to a central estimate of 2.4 (95% range 0.09–4.7). A 5-year backtest shows a typical error of ±11.8%, with 100% of held-out values landing inside the 95% band.

-14%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 →
2.4Projected 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 →
0.09–4.795% 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 →
±11.8%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 fall about 14% by 2029 — from 2.8 in 2024 to a central estimate of 2.4 (95% range 0.09–4.7). A 5-year backtest shows a typical error of ±11.8%, 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 →
20252.50.154.8
20262.40.134.7
20272.40.124.7
20282.40.104.7
20292.40.094.7

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 →
BarnhouseOREGON392024
SilviesOREGON382024
Omak CreekWASHINGTON382024
MonumentOREGON312024
Silver CreekOREGON282024
Donelly 2OREGON222024
Hash RockOREGON172024
NewbridgeOREGON172024
DonnellyOREGON172006
OchocoOREGON161982
Mount VernonOREGON152024
Black Mtn.OREGON142004
CloverlandWASHINGTON142024
Yellow PineIDAHO132016
CentervilleIDAHO112019
Eagle CreekOREGON92022
WoodruffUTAH92024
Colter BayWYOMING91999
CascadeIDAHO81984
Cape HornIDAHO82024
BurgdorfIDAHO82016
OchocoOREGON82024
FloraOREGON72023
TroyOREGON72024
West ThumbWYOMING71982

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