BirdAnalyst
Species · Maine · BBS 2025 Release · 1966–2024

Sharp-shinned Hawk Population Trend in Maine

All statesGeneralists

Sharp-shinned Hawk in Maine has edged down: down 20% on the route-weighted index since 1978.

-20%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 →
36Routes 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 →
41YearsYears 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 MaineNotable 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 Maine. See the full index history below.

Sharp-shinned Hawk Population Forecast in Maine

If the recent trend holds, Sharp-shinned Hawk in Maine is projected to fall about 15% by 2029 — from 0.05 in 2024 to a central estimate of 0.04 (95% range 0.00–0.11). A 5-year backtest shows a typical error of ±26.3%, with 100% of held-out values landing inside the 95% band.

-15%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 →
0.04Projected 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 →
0.00–0.1195% 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 →
±26.3%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 Maine is projected to fall about 15% by 2029 — from 0.05 in 2024 to a central estimate of 0.04 (95% range 0.00–0.11). A 5-year backtest shows a typical error of ±26.3%, with 100% of held-out values landing inside the 95% band.19732029
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 →
20250.050.000.11
20260.050.000.11
20270.050.000.11
20280.050.000.11
20290.040.000.11

Sharp-shinned Hawk Survey Routes in Maine

Routes recording Sharp-shinned Hawk in Maine.
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 →
St David219941994
Northfield 2120192019
Biddeford120091982
Newcastle119851985
Wilson Mills119971988
Turner120102010
Greenwood120181973
South Arm120061979
Otisfield Gr120151973
Hartford120111981
Bowdoin Ctr120001990
Manchester119951992
East Troy120181990
Freedom120021996
Harmony119851985
Clayton Lake 2120132013
Eastbrook119851985
Hancock119791979
Aurora119931993
Cooper120031976
Deblois119971989
Brownfield 2120162016
Carrabassett120241984
Seboomook Lk120121978
Greenville120131985

Sharp-shinned Hawk Population Trend in Other States

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

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