BirdAnalyst
Species · New Hampshire · BBS 2025 Release · 1966–2024

American Goldfinch Population Trend in New Hampshire

All statesGeneralists

American Goldfinch in New Hampshire has edged up: up 13% on the route-weighted index since 1968.

+13%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 →
58YearsYears 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 28% by 2029 — from 12 in 2024 to a central estimate of 15 (95% range 9.6–21). A 5-year backtest shows a typical error of ±11.5%, with 100% of held-out values landing inside the 95% band.

+28%Change by 2029TrendPercent 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 2029 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 →
±11.5%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 28% by 2029 — from 12 in 2024 to a central estimate of 15 (95% range 9.6–21). A 5-year backtest shows a typical error of ±11.5%, with 100% of held-out values landing inside the 95% band.19662029
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 →
2025159.221
2026159.321
2027159.421
2028159.521
2029159.621

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 →
Dover2820241966
Epsom2620231966
Canterbury2220241966
Walpole2220241966
Strafford2120241966
Fitzwilliam2020241966
Brentwood1919981966
Concord1820241966
Mt Chocorua1820241966
Peterborough1720241966
Glen1620241975
Marlow1320241966
Gilmantn I W1220241969
East Kingston1220241999
Dixvil Notch1020171966
Wilmot920241966
Hopkinton820241966
Milan820241966
Clarksville820231966
Crawford Not719751966
Dixville Notch 2620242018
Lempster520241966
Jefferson Hl520241966
Franconia220241966
Stratford220241966

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 2026-05-22.