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

Yellow-bellied Sapsucker Population Trend in New Hampshire

All statesForest birds

Yellow-bellied Sapsucker in New Hampshire has surged: up 97% on the route-weighted index since 1968.

+97%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 →
25Routes 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 Yellow-bellied Sapsucker 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 →

Yellow-bellied Sapsucker has surged in New Hampshire: up 97% on the route-weighted index since 1968.

Yellow-bellied Sapsucker Population Forecast in New Hampshire

If the recent trend holds, Yellow-bellied Sapsucker in New Hampshire is projected to rise about 18% by 2030 — from 4.1 in 2025 to a central estimate of 4.8 (95% range 2.6–7.0). A 5-year backtest shows a typical error of ±29%, with 60% of held-out values landing inside the 95% band.

+18%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 →
4.8Projected 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 →
2.6–7.095% 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 →
±29%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, Yellow-bellied Sapsucker in New Hampshire is projected to rise about 18% by 2030 — from 4.1 in 2025 to a central estimate of 4.8 (95% range 2.6–7.0). A 5-year backtest shows a typical error of ±29%, 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 →
20264.62.46.7
20274.62.56.8
20284.72.56.9
20294.82.66.9
20304.82.67.0

Yellow-bellied Sapsucker Survey Routes in New Hampshire

Routes recording Yellow-bellied Sapsucker 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 →
Strafford1420241966
Canterbury1320251966
Marlow1120251966
Gilmantn I W820251970
Wilmot820251966
Walpole820251967
Lempster820251969
Franconia720251966
Milan720241966
Dixville Notch 2720252018
Jefferson Hl620251966
Dixvil Notch620171966
Mt Chocorua520251966
Crawford Not519751966
Jeffers Ntch420251993
Fitzwilliam320241983
Glen320251975
Peterborough120251969
Brentwood119681968
Hopkinton120251968
Epsom120251970
Concord120251970
Stratford120251966
Clarksville120251966
East Kingston120212021

Yellow-bellied Sapsucker Population Trend in Other States

alaskaconnecticutillinoisiowamainemarylandmassachusettsmichiganminnesotanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiopennsylvaniarhode-islandsouth-dakotatennesseeutahvermontvirginiawest-virginiawisconsin

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