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

House Finch In Northern Rockies

All regionsNorthern RockiesGeneralists

House Finch in Northern Rockies has surged: up 309% on the route-weighted index since 1970.

+309%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 →
127Routes 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

House Finch has surged in Northern Rockies: up 309% on the route-weighted index since 1970.

House Finch In Northern Rockies Population Forecast

If the recent trend holds, House Finch in Northern Rockies is projected to fall about 28% by 2030 — from 1.1 in 2025 to a central estimate of 0.76 (95% range 0.00–2.7). A 5-year backtest shows a typical error of ±25.9%, with 100% of held-out values landing inside the 95% band.

-28%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 →
0.76Projected 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 →
0.00–2.795% 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 →
±25.9%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, House Finch in Northern Rockies is projected to fall about 28% by 2030 — from 1.1 in 2025 to a central estimate of 0.76 (95% range 0.00–2.7). A 5-year backtest shows a typical error of ±25.9%, 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 →
20260.780.002.7
20270.780.002.7
20280.770.002.7
20290.770.002.7
20300.760.002.7

Routes In Northern Rockies

Routes recording House 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 →
KalispellMONTANA242025
Church HillMONTANA162025
Clyde ParkMONTANA142025
CascadeIDAHO121980
Willow Creek 2MONTANA112025
Wise RiverMONTANA102018
VictorMONTANA102025
Spring LakeWASHINGTON91994
BridgeportOREGON82025
Clover CreekOREGON72025
SpartaOREGON62025
MonumentOREGON62025
TwickenhamOREGON62025
MooseWYOMING61989
MeeteetseWYOMING62025
Carter 2WYOMING62022
GlenMONTANA52017
ChewelahWASHINGTON52021
TensleepWYOMING52025
Soda LakeWYOMING52021
Painted RockMONTANA41994
Threemile WaMONTANA42025
DonnybrookOREGON41997
RandolphUTAH42024
LovellWYOMING42024

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