BirdAnalyst
Species · New Hampshire · BBS 2026 Release · 1966–2025

American Goldfinch Population Trend in New Hampshire

All statesForest birds

American Goldfinch in New Hampshire has held roughly steady: up 0% on the route-weighted index since 1968.

+0%Since 1968TrendPercent 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 →
26Routes 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 →
59YearsYears 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 New HampshireNotable 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 American Goldfinch in New Hampshire. See the full index history below.

American Goldfinch Population Forecast in New Hampshire

If the recent trend holds, American Goldfinch in New Hampshire is projected to rise about 11% by 2030 — from 14 in 2025 to a central estimate of 15 (95% range 9.6–21). A 5-year backtest shows a typical error of ±13.2%, with 100% of held-out values landing inside the 95% band.

+11%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 →
15Projected 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 →
9.6–2195% 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 →
±13.2%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 New Hampshire is projected to rise about 11% by 2030 — from 14 in 2025 to a central estimate of 15 (95% range 9.6–21). A 5-year backtest shows a typical error of ±13.2%, with 100% of held-out values landing inside the 95% band.19662030
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 →
2026159.221
2027159.321
2028159.421
2029159.521
2030159.621

American Goldfinch Survey Routes in New Hampshire

Routes recording American Goldfinch in New Hampshire.
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 →
Canterbury3520251966
Dover3420251966
Marlow2220251966
East Kingston2120251999
Wilmot2020251966
Brentwood1919981966
Glen1720251975
Dixville Notch 21720252018
Peterborough1620251966
Fitzwilliam1520251966
Concord1420251966
Gilmantn I W1420251969
Mt Chocorua1220251966
Epsom1120251966
Walpole1120251966
Strafford1020251966
Milan1020251966
Dixvil Notch1020171966
Lempster820251966
Hopkinton720251966
Crawford Not719751966
Jefferson Hl620251966
Franconia620251966
Stratford520251966
Clarksville520251966

American Goldfinch Population Trend in Other States

alabamaarkansascaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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