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

American Goshawk In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionGeneralists

American Goshawk in Boreal Hardwood Transition has declined: down 44% on the route-weighted index since 1974.

-44%Since 1974TrendPercent 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 →
35Routes 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 →
30YearsYears 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 Goshawk in Boreal Hardwood Transition. See the full index history below.

American Goshawk In Boreal Hardwood Transition Population Forecast

If the recent trend holds, American Goshawk in Boreal Hardwood Transition is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.03). A 5-year backtest shows a typical error of ±43.1%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.02Projected 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 →
0.00–0.0395% 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 →
±43.1%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 Goshawk in Boreal Hardwood Transition is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.03). A 5-year backtest shows a typical error of ±43.1%, with 100% of held-out values landing inside the 95% band.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 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 →
20250.020.000.03
20260.020.000.03
20270.020.000.03
20280.020.000.03
20290.020.000.03

Routes In Boreal Hardwood Transition

Routes recording American Goshawk 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 →
MareniscoMICHIGAN11985
BootjackMICHIGAN12001
Ned LakeMICHIGAN12021
Maple GroveMICHIGAN11996
WilsonMICHIGAN12001
CunardMICHIGAN11993
ShingletonMICHIGAN11990
Bear LakeMICHIGAN12023
Skegemog PtMICHIGAN12013
Red OakMICHIGAN12022
Frederic 2MICHIGAN12006
Mille LacsMINNESOTA11997
BackusMINNESOTA11991
HovlandMINNESOTA11980
Hart LakeMINNESOTA12008
FloodwoodMINNESOTA11982
CohassetMINNESOTA12005
Little ForkMINNESOTA12004
LudeMINNESOTA12004
MahtowaMINNESOTA11998
McgregorMINNESOTA12013
GreenbushMINNESOTA12018
Cass LakeMINNESOTA11984
BayfieldWISCONSIN11994
ShanagoldenWISCONSIN11975

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