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

Sharp-shinned Hawk In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionGeneralists

Sharp-shinned Hawk in Boreal Hardwood Transition has declined: down 41% on the route-weighted index since 1970.

-41%Since 1970TrendPercent 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 →
77Routes 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 →
49YearsYears 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 Sharp-shinned Hawk in Boreal Hardwood Transition. See the full index history below.

Sharp-shinned Hawk In Boreal Hardwood Transition Population Forecast

If the recent trend holds, Sharp-shinned Hawk in Boreal Hardwood Transition is projected to stay roughly flat through 2029, near 0.03 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±31.3%, 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 →
0.03Projected 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 →
0.00–0.0995% 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 →
±31.3%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, Sharp-shinned Hawk in Boreal Hardwood Transition is projected to stay roughly flat through 2029, near 0.03 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±31.3%, with 100% of held-out values landing inside the 95% band.19672029
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 →
20250.030.000.09
20260.030.000.09
20270.030.000.09
20280.030.000.09
20290.030.000.09

Routes In Boreal Hardwood Transition

Routes recording Sharp-shinned Hawk 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 →
OntonagonMICHIGAN21985
PickfordMICHIGAN22012
FredericMICHIGAN21981
BrainerdMINNESOTA21998
ExelandWISCONSIN22021
MareniscoMICHIGAN12011
BootjackMICHIGAN12017
Ned LakeMICHIGAN12019
Maple GroveMICHIGAN12024
IshpemingMICHIGAN12010
WilsonMICHIGAN12010
CunardMICHIGAN11991
ShingletonMICHIGAN11986
IsabellaMICHIGAN12011
Bear LakeMICHIGAN12006
MuskallongeMICHIGAN12017
GilchristMICHIGAN11995
Traverse CtyMICHIGAN11977
RiggsvilleMICHIGAN11976
SkeelsMICHIGAN11991
Red OakMICHIGAN11994
CathroMICHIGAN12013
Hubbard LakeMICHIGAN11993
HarriettaMICHIGAN12016
HerronMICHIGAN12012

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