BirdAnalyst
Species · Wyoming · BBS 2026 Release · 1966–2025

American Goldfinch Population Trend in Wyoming

All statesForest birds

American Goldfinch in Wyoming has risen sharply: up 56% on the route-weighted index since 1970.

+56%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 →
93Routes In StateSurvey 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 American Goldfinch Trends in WyomingNotable 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 →

American Goldfinch has risen sharply in Wyoming: up 56% on the route-weighted index since 1970.

American Goldfinch Population Forecast in Wyoming

If the recent trend holds, American Goldfinch in Wyoming is projected to stay roughly flat through 2030, near 1.8 (95% range 1.1–2.5). A 5-year backtest shows a typical error of ±19.3%, with 100% of held-out values landing inside the 95% band.

+3%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 →
1.8Projected 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 →
1.1–2.595% 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 →
±19.3%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, American Goldfinch in Wyoming is projected to stay roughly flat through 2030, near 1.8 (95% range 1.1–2.5). A 5-year backtest shows a typical error of ±19.3%, 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 →
20261.70.992.5
20271.71.02.5
20281.81.02.5
20291.81.02.5
20301.81.12.5

American Goldfinch Survey Routes in Wyoming

Routes recording American Goldfinch in Wyoming.
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 →
Meeteetse1520251992
Cody1120251983
Wyarno1120251976
Otto1020251970
Sybille Cyn1020251990
Riverside820251968
Sweetwater820091980
Fletcher Pk820241979
Moskee 3820252022
Sundance720251976
Dayton720251980
Dwyer620251994
Seely620001990
Buckskin Mtn620172003
Leo620251994
Brookhurst520191968
Clark520251990
Lovell520241989
Tensleep520251995
Wilson520251980
Anchor520162002
Warbonnet520251990
Seely 2520252001
Moskee 2520212002
Yoder420091969

American Goldfinch Population Trend in Other States

alabamaarkansascaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsin

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