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

Common Grackle In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionGeneralists

Common Grackle in Boreal Hardwood Transition has edged down: down 19% on the route-weighted index since 1968.

-19%Since 1968
126Routes In Region
58Years

Notable Signals

No notable trend signals for Common Grackle in Boreal Hardwood Transition. See the full index history below.

Forecast

If the recent trend holds, Common Grackle in Boreal Hardwood Transition is projected to fall about 19% by 2029 — from 5.7 in 2024 to a central estimate of 4.7 (95% range 0.94–8.4). A 5-year backtest shows a typical error of ±20.9%, with 100% of held-out values landing inside the 95% band.

-19%Change by 2029
4.7Projected 2029 index
0.94–8.495% range
±20.9%Backtest error
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 index95% low95% high
20254.91.28.7
20264.91.28.6
20274.81.18.5
20284.71.08.4
20294.70.948.4

Routes In Boreal Hardwood Transition

Routes recording Common Grackle in Boreal Hardwood Transition.
Brocky LakeMICHIGAN532024
Walloon Lake 2MICHIGAN512024
SkeelsMICHIGAN472015
Traverse CtyMICHIGAN361992
MareniscoMICHIGAN302019
MayfieldMICHIGAN252022
ShanagoldenWISCONSIN212024
FredericMICHIGAN202003
PickfordMICHIGAN192024
RiggsvilleMICHIGAN192019
Cedar RunMICHIGAN171999
Crystal FlsMICHIGAN162024
PhillipsWISCONSIN162024
Pleasant Valley 2MICHIGAN142024
Union TwpWISCONSIN142024
IronsMICHIGAN131989
Little ForkMINNESOTA132024
Bear LakeMICHIGAN122024
Skegemog PtMICHIGAN122024
Walloon LakeMICHIGAN122004
Brush CreekMICHIGAN112016
CathroMICHIGAN112016
NebishMINNESOTA112022
Rib LakeWISCONSIN112024
IrmaWISCONSIN112024

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