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Species · BCR 12 · BBS 2025 Release · 1966–2024

American Crow In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionGeneralists

American Crow in Boreal Hardwood Transition has held roughly steady: down 9% on the route-weighted index since 1968.

-9%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 →
127Routes In RegionSurvey 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 SignalsNotable 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 Boreal Hardwood Transition. See the full index history below.

American Crow In Boreal Hardwood Transition Population Forecast

If the recent trend holds, American Crow in Boreal Hardwood Transition is projected to rise about 40% by 2029 — from 20 in 2024 to a central estimate of 28 (95% range 19–36). A 5-year backtest shows a typical error of ±53.2%, with 0% of held-out values landing inside the 95% band.

+40%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 →
19–3695% 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 →
±53.2%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 Boreal Hardwood Transition is projected to rise about 40% by 2029 — from 20 in 2024 to a central estimate of 28 (95% range 19–36). A 5-year backtest shows a typical error of ±53.2%, with 0% 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 →
2025281937
2026281937
2027281937
2028281936
2029281936

Routes In Boreal Hardwood Transition

Routes recording American Crow in Boreal Hardwood Transition.
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 →
BagleyMINNESOTA1102006
BabbittMINNESOTA892023
WarroadMINNESOTA732024
Iron RiverWISCONSIN732024
Ned LakeMICHIGAN612024
Weirgor SpringsWISCONSIN612024
Skegemog PtMICHIGAN492024
LudeMINNESOTA482023
ConoverWISCONSIN462024
Sherry LakeMINNESOTA452022
WilsonMICHIGAN442010
BemidjiMINNESOTA441980
PickfordMICHIGAN432024
BayfieldWISCONSIN432024
Amnicon FallsWISCONSIN432024
MayfieldMICHIGAN422022
GilmanWISCONSIN412024
PhillipsWISCONSIN412024
Washington IWISCONSIN412024
BootjackMICHIGAN372023
HerronMICHIGAN362016
NebishMINNESOTA362023
Union TwpWISCONSIN352024
Crystal FlsMICHIGAN342024
SkeelsMICHIGAN342015

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