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Species · Maryland · BBS 2026 Release · 1966–2025

American Crow Population Trend in Maryland

All statesGeneralists

American Crow in Maryland has held roughly steady: up 3% on the route-weighted index since 1968.

+3%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 →
76Routes 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 →
59YearsYears 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 MarylandNotable 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 Maryland. See the full index history below.

American Crow Population Forecast in Maryland

If the recent trend holds, American Crow in Maryland is projected to rise about 16% by 2030 — from 37 in 2025 to a central estimate of 43 (95% range 30–56). A 5-year backtest shows a typical error of ±32.7%, with 80% of held-out values landing inside the 95% band.

+16%Change by 2030TrendPercent 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 →
43Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
30–5695% 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 →
±32.7%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, American Crow in Maryland is projected to rise about 16% by 2030 — from 37 in 2025 to a central estimate of 43 (95% range 30–56). A 5-year backtest shows a typical error of ±32.7%, with 80% of held-out values landing inside the 95% band.19662030
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 →
2026432956
2027432956
2028433056
2029433056
2030433056

American Crow Survey Routes in Maryland

Routes recording American Crow in Maryland.
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 →
Fruitland8919981966
Olney7320251966
Cokesbury7320251966
Eklo7220181966
Island Creek7020251991
Finzel6820251995
Hughesville6720251966
Nottingham6420252005
Newark6020251966
Warfieldsbrg5820251966
Walnut5820241999
Pr Frederick5820251991
Wheaton5720251990
Fowblesburg5520171966
Jennings5520251995
St. George'S Island5520172015
Tall Timbers5120141966
Jones4819941966
Randallstown4720131966
Mt Nebo4519911969
Pomfret4520241966
Berlin4520251980
Madison4420251966
Theodore4220161968
Davidsnville4220251982

American Crow Population Trend in Other States

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

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.