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

Golden-crowned Kinglet Population Trend in New Hampshire

All statesForest birds

Golden-crowned Kinglet in New Hampshire has surged: up 171% on the route-weighted index since 1968.

+171%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 →
16Routes 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 →
54YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Golden-crowned Kinglet 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 →

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 →

Golden-crowned Kinglet has surged in New Hampshire: up 171% on the route-weighted index since 1968.

Golden-crowned Kinglet Population Forecast in New Hampshire

If the recent trend holds, Golden-crowned Kinglet in New Hampshire is projected to rise about 112% by 2030 — from 0.52 in 2025 to a central estimate of 1.1 (95% range 0.41–1.8). A 5-year backtest shows a typical error of ±99.5%, with 60% of held-out values landing inside the 95% band.

+112%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 →
1.1Projected 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 →
0.41–1.895% 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 →
±99.5%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, Golden-crowned Kinglet in New Hampshire is projected to rise about 112% by 2030 — from 0.52 in 2025 to a central estimate of 1.1 (95% range 0.41–1.8). A 5-year backtest shows a typical error of ±99.5%, with 60% 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 →
20261.00.351.7
20271.10.371.8
20281.10.381.8
20291.10.401.8
20301.10.411.8

Golden-crowned Kinglet Survey Routes in New Hampshire

Routes recording Golden-crowned Kinglet 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 →
Dixvil Notch620171966
Dixville Notch 2620252018
Peterborough319671967
Clarksville320251967
Fitzwilliam220141983
Lempster220242024
Franconia220251968
Dover119881988
Epsom120192019
Wilmot120232007
Mt Chocorua119981972
Walpole120231998
Milan120251986
Stratford120221995
Glen120241988
Jeffers Ntch120091993

Golden-crowned Kinglet Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutgeorgiaidahomainemarylandmassachusettsmichiganminnesotamontananevadanew-jerseynew-mexiconew-yorknorth-carolinaohiooregonpennsylvaniasouth-dakotatennesseeutahvermontwashingtonwest-virginiawisconsinwyoming

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