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

Yellow-bellied Sapsucker Population Trend in New Hampshire

All statesForest birds

Yellow-bellied Sapsucker in New Hampshire has surged: up 138% on the route-weighted index since 1968.

+138%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 →
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 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 138% 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 fall about 19% by 2029 — from 6.0 in 2024 to a central estimate of 4.8 (95% range 2.6–7.0). A 5-year backtest shows a typical error of ±29.2%, with 40% of held-out values landing inside the 95% band.

-19%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 →
4.8Projected 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 →
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 →
±29.2%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, Yellow-bellied Sapsucker in New Hampshire is projected to fall about 19% by 2029 — from 6.0 in 2024 to a central estimate of 4.8 (95% range 2.6–7.0). A 5-year backtest shows a typical error of ±29.2%, with 40% 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 →
20254.62.36.8
20264.62.46.8
20274.72.56.9
20284.72.56.9
20294.82.67.0

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 →
Wilmot2120241966
Canterbury1720241966
Strafford1420241966
Marlow1420241966
Jefferson Hl1120241966
Concord820241970
Milan720241966
Mt Chocorua620241966
Franconia620241966
Dixvil Notch620171966
Dixville Notch 2620242018
Walpole520241967
Crawford Not519751966
Lempster420241969
Fitzwilliam320241983
Epsom320231970
Clarksville320241966
Hopkinton220241968
Gilmantn I W220241970
Stratford220221966
Glen220231975
Peterborough120241969
Brentwood119681968
East Kingston120212021
Jeffers Ntch120241993

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 2026-05-22.