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

Pine Siskin In Northern Rockies

All regionsNorthern RockiesForest birds

Pine Siskin 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 →
173Routes 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 Pine Siskin in Northern Rockies. See the full index history below.

Pine Siskin In Northern Rockies Population Forecast

If the recent trend holds, Pine Siskin in Northern Rockies is projected to fall about 29% by 2030 — from 8.4 in 2025 to a central estimate of 6.0 (95% range 0.00–14). A 5-year backtest shows a typical error of ±41.1%, with 100% of held-out values landing inside the 95% band.

-29%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 →
6.0Projected 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 →
0.00–1495% 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 →
±41.1%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, Pine Siskin in Northern Rockies is projected to fall about 29% by 2030 — from 8.4 in 2025 to a central estimate of 6.0 (95% range 0.00–14). A 5-year backtest shows a typical error of ±41.1%, 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 →
20266.30.0014
20276.20.0014
20286.10.0014
20296.00.0014
20306.00.0014

Routes In Northern Rockies

Routes recording Pine Siskin 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 →
Fish CreekMONTANA1152024
CascadeIDAHO751984
Buckskin MtnWYOMING752025
Deep CreekIDAHO611985
Omak CreekWASHINGTON532024
AlpineWYOMING532025
WoodmanMONTANA502025
ChallisIDAHO422025
CusickWASHINGTON402025
Colter Bay 2WYOMING402025
Thompson RivMONTANA392024
Howard Mdws.OREGON382025
CobaltIDAHO362025
Hebgen LakeMONTANA362025
AveryIDAHO352025
Marble CreekIDAHO352025
Sullivan Lake 2WASHINGTON342025
ClintonMONTANA332025
MammothWYOMING332025
St RegisMONTANA322025
Pryor Mtn.MONTANA322025
WilsonWYOMING322025
Sullivan LkWASHINGTON311999
Swan LakeMONTANA302025
Red RockMONTANA292025

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