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

Sharp-shinned Hawk Population Trend in New Hampshire

All statesGeneralists

Sharp-shinned Hawk in New Hampshire has held roughly steady: down 4% on the route-weighted index since 1976.

-4%Since 1976TrendPercent 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 →
22Routes 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 →
31YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Sharp-shinned Hawk 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 Sharp-shinned Hawk in New Hampshire. See the full index history below.

Sharp-shinned Hawk Population Forecast in New Hampshire

If the recent trend holds, Sharp-shinned Hawk in New Hampshire is projected to fall about 48% by 2029 — from 0.09 in 2024 to a central estimate of 0.05 (95% range 0.00–0.10). A 5-year backtest shows a typical error of ±32.4%, with 80% of held-out values landing inside the 95% band.

-48%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 →
0.05Projected 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 →
0.00–0.1095% 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 →
±32.4%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, Sharp-shinned Hawk in New Hampshire is projected to fall about 48% by 2029 — from 0.09 in 2024 to a central estimate of 0.05 (95% range 0.00–0.10). A 5-year backtest shows a typical error of ±32.4%, with 80% of held-out values landing inside the 95% band.19692029
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 →
20250.050.000.10
20260.050.000.10
20270.050.000.10
20280.050.000.10
20290.050.000.10

Sharp-shinned Hawk Survey Routes in New Hampshire

Routes recording Sharp-shinned Hawk 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 →
Peterborough120242006
Brentwood119961973
Fitzwilliam120161969
Dover120232023
Hopkinton120022002
Epsom119881978
Concord120001986
Strafford120172001
Canterbury119871983
Wilmot119981998
Mt Chocorua120172017
Walpole119901990
Marlow119951995
Lempster119811981
Crawford Not119691969
Jefferson Hl119981998
Franconia119961983
Milan120192007
Stratford120142014
Dixvil Notch119921988
Jeffers Ntch120042004
Dixville Notch 2120242024

Sharp-shinned Hawk Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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