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

Red-breasted Nuthatch Population Trend in New Hampshire

All statesForest birds

Red-breasted Nuthatch in New Hampshire has surged: up 146% on the route-weighted index since 1968.

+146%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 Red-breasted Nuthatch 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 →

Red-breasted Nuthatch has surged in New Hampshire: up 146% on the route-weighted index since 1968.

Red-breasted Nuthatch Population Forecast in New Hampshire

If the recent trend holds, Red-breasted Nuthatch in New Hampshire is projected to rise about 22% by 2029 — from 2.4 in 2024 to a central estimate of 2.9 (95% range 1.4–4.4). A 5-year backtest shows a typical error of ±30.6%, with 80% of held-out values landing inside the 95% band.

+22%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 →
2.9Projected 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 →
1.4–4.495% 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 →
±30.6%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, Red-breasted Nuthatch in New Hampshire is projected to rise about 22% by 2029 — from 2.4 in 2024 to a central estimate of 2.9 (95% range 1.4–4.4). A 5-year backtest shows a typical error of ±30.6%, with 80% 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 →
20252.81.34.3
20262.81.34.4
20272.91.44.4
20282.91.44.4
20292.91.44.4

Red-breasted Nuthatch Survey Routes in New Hampshire

Routes recording Red-breasted Nuthatch 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 →
Glen820241975
Dixville Notch 2820242018
Gilmantn I W620211969
Jefferson Hl620241967
Franconia620241967
Strafford520211968
Clarksville520241967
Mt Chocorua420241966
Walpole420241973
Lempster420241969
Dover320211966
Hopkinton320221967
Milan320241967
Dixvil Notch320171966
Fitzwilliam220221967
Canterbury220241972
Stratford220231970
Peterborough120241968
Brentwood119981977
Epsom120231968
Concord120241967
Wilmot120241970
Marlow120221968
Crawford Not119671967
East Kingston120161999

Red-breasted Nuthatch Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahoillinoisindianakansasmainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseeutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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