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Species · Massachusetts · BBS 2025 Release · 1966–2024

Sharp-shinned Hawk Population Trend in Massachusetts

All statesGeneralists

Sharp-shinned Hawk in Massachusetts has increased: up 32% on the route-weighted index since 1978.

+32%Since 1978TrendPercent 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 →
19YearsYears 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 MassachusettsNotable 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 Massachusetts. See the full index history below.

Sharp-shinned Hawk Population Forecast in Massachusetts

If the recent trend holds, Sharp-shinned Hawk in Massachusetts is projected to rise about 51% by 2027 — from 0.06 in 2022 to a central estimate of 0.09 (95% range 0.04–0.14). A 5-year backtest shows a typical error of ±36.7%, with 80% of held-out values landing inside the 95% band.

+51%Change by 2027TrendPercent 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 →
0.09Projected 2027 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.04–0.1495% 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 →
±36.7%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 Massachusetts is projected to rise about 51% by 2027 — from 0.06 in 2022 to a central estimate of 0.09 (95% range 0.04–0.14). A 5-year backtest shows a typical error of ±36.7%, with 80% of held-out values landing inside the 95% band.19692027
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 →
20230.090.040.13
20240.090.040.13
20250.090.040.13
20260.090.040.14
20270.090.040.14

Sharp-shinned Hawk Survey Routes in Massachusetts

Routes recording Sharp-shinned Hawk in Massachusetts.
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 →
E Dennis120212021
Marion119961996
Cape Cod Ns120072007
Brockton119971997
Littleton120222013
Belchertown120042004
Warren120041990
S Barre120031976
N Orange119931969
Cummington119981998
Chesterfield120212021
Holden119841978
N. Andover120072007
Sheffield119951990
Warren 2120192019
Hancock120132001

Sharp-shinned Hawk Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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