BirdAnalyst
Species · Colorado · BBS 2025 Release · 1966–2024

American Goldfinch Population Trend in Colorado

All statesGeneralists

American Goldfinch in Colorado has surged: up 186% on the route-weighted index since 1970.

+186%Since 1970
106Routes In State
56Years

Notable American Goldfinch Trends in Colorado

long arc increasecomputed index

American Goldfinch has surged in Colorado: up 186% on the route-weighted index since 1970.

American Goldfinch Population Forecast in Colorado

If the recent trend holds, American Goldfinch in Colorado is projected to rise about 98% by 2029 — from 0.46 in 2024 to a central estimate of 0.92 (95% range 0.07–1.8). A 5-year backtest shows a typical error of ±35.6%, with 100% of held-out values landing inside the 95% band.

+98%Change by 2029
0.92Projected 2029 index
0.07–1.895% range
±35.6%Backtest error
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 index95% low95% high
20250.910.061.8
20260.910.061.8
20270.920.071.8
20280.920.071.8
20290.920.071.8

American Goldfinch Survey Routes in Colorado

Routes recording American Goldfinch in Colorado.
Yampa6120231972
Dolores Riv1020172012
Cheesman Lk920241979
Thomasville919931992
Adams Co.820221992
Blackhead Pk820212004
Flattops720062003
Limon720031992
Pinneo620191991
Buffalo Park620232011
Bennett620151995
Rifle Falls620211999
Dolores519871968
Deadman Rd.520242011
Colona419871977
Kiowa 2420242019
Rockport420182013
Douglas Pass320241986
Kiowa320181968
Hudson320231994
Alamosa320221988
Villegreen320011996
Cortez320081988
Dunckley Pas320241992
Yellowjacket Pass320241998

American Goldfinch Population Trend in Other States

alabamaarkansascaliforniaconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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