BirdAnalyst
Species · BCR 23 · BBS 2025 Release · 1966–2024

Common Grackle In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionGeneralists

Common Grackle in Prairie Hardwood Transition has fallen sharply: down 61% on the route-weighted index since 1968.

-61%Since 1968
161Routes In Region
58Years

Notable Signals

long arc declinecomputed index

Common Grackle has fallen sharply in Prairie Hardwood Transition: down 61% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Common Grackle in Prairie Hardwood Transition is projected to fall about 42% by 2029 — from 24 in 2024 to a central estimate of 14 (95% range 0.00–36). A 5-year backtest shows a typical error of ±13.6%, with 100% of held-out values landing inside the 95% band.

-42%Change by 2029
14Projected 2029 index
0.00–3695% range
±13.6%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
2025190.0041
2026180.0040
2027160.0039
2028150.0038
2029140.0036

Routes In Prairie Hardwood Transition

Routes recording Common Grackle in Prairie Hardwood Transition.
BismarkOHIO1961995
VickeryOHIO1562024
Cherry ValILLINOIS1242003
South BendINDIANA1201991
GraytownOHIO1101984
KielWISCONSIN1062022
New LondonMINNESOTA1032024
PettysvilleMICHIGAN941979
OmroWISCONSIN822001
Mount HorebWISCONSIN781990
S LyonsMICHIGAN771992
Pt WashingtnWISCONSIN762024
WeyerhauserWISCONSIN752024
WhitewaterMINNESOTA732000
RichmondMICHIGAN672024
LawrenceMICHIGAN652024
NapoleonOHIO652024
North BranchMICHIGAN641999
Drayton PlnsMICHIGAN641987
AnnatonWISCONSIN602024
PackertownINDIANA582004
Whitewater 2MINNESOTA562019
LockportOHIO542024
GrimmsWISCONSIN522021
Maple RapidsMICHIGAN472023

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