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

Broad-winged Hawk Population Trend in Massachusetts

All statesGeneralists

Broad-winged Hawk in Massachusetts has surged: up 99% on the route-weighted index since 1970.

+99%Since 1970
28Routes In State
51Years

Notable Broad-winged Hawk Trends in Massachusetts

long arc increasecomputed index

Broad-winged Hawk has surged in Massachusetts: up 99% on the route-weighted index since 1970.

Broad-winged Hawk Population Forecast in Massachusetts

If the recent trend holds, Broad-winged Hawk in Massachusetts is projected to fall about 27% by 2029 — from 0.47 in 2024 to a central estimate of 0.34 (95% range 0.05–0.63). A 5-year backtest shows a typical error of ±35.8%, with 100% of held-out values landing inside the 95% band.

-27%Change by 2029
0.34Projected 2029 index
0.05–0.6395% range
±35.8%Backtest error
19682029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.330.040.62
20260.330.040.62
20270.330.040.63
20280.340.040.63
20290.340.050.63

Broad-winged Hawk Survey Routes in Massachusetts

Routes recording Broad-winged Hawk in Massachusetts.
Brockton420172017
Ware River420221993
Mansfield220241969
Chesterfield220241969
Holden220231978
Hancock220152014
E Dennis120091978
Marion120231969
Wellfleet119951979
Prattville120092009
Newburyport120211971
Maynard120171969
Littleton120101968
N Oxford120211968
E Pepperell119831981
Belchertown120161971
Warren120091968
S Barre120241972
N Orange120231972
Cummington120141972
Cheshire119881973
Pittsfield120061971
Sheffield120001976
Monterey120232022
Wellfleet 2120182018

Broad-winged Hawk Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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