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Species · Massachusetts · BBS 2025 Release · 1966–2024

American Crow Population Trend in Massachusetts

All statesGeneralists

American Crow in Massachusetts has edged up: up 22% on the route-weighted index since 1968.

+22%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 →
32Routes 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 American Crow 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 American Crow in Massachusetts. See the full index history below.

American Crow Population Forecast in Massachusetts

If the recent trend holds, American Crow in Massachusetts is projected to rise about 25% by 2029 — from 22 in 2024 to a central estimate of 28 (95% range 13–43). A 5-year backtest shows a typical error of ±62.6%, with 100% of held-out values landing inside the 95% band.

+25%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 →
28Projected 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 →
13–4395% 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 →
±62.6%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, American Crow in Massachusetts is projected to rise about 25% by 2029 — from 22 in 2024 to a central estimate of 28 (95% range 13–43). A 5-year backtest shows a typical error of ±62.6%, with 100% 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 →
2025281343
2026281343
2027281343
2028281343
2029281343

American Crow Survey Routes in Massachusetts

Routes recording American Crow 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 →
Cheshire6719941969
Belchertown5820241967
Pittsfield5120161967
Chesterfield4820241967
E Pepperell3819941966
Cape Cod Ns3420071989
Brockton3320191967
Wellfleet 23320242016
Marion3220241966
Chilmark2919831969
Princeton2719761969
Littleton2620241967
Newburyport2520221967
Wellfleet2420071966
S Barre2420241968
E Dennis2020211967
N Oxford2020241968
Gay Head1620241996
Monterey1520242019
Cummington 21520242015
Hancock1320151997
Holden1220241977
N. Andover1020241995
Warren 21020242010
Maynard920221967

American Crow Population Trend in Other States

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

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