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

Savannah Sparrow In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionGrassland birds

Savannah Sparrow in Boreal Hardwood Transition has fallen sharply: down 66% on the route-weighted index since 1968.

-66%Since 1968
106Routes In Region
58Years

Notable Signals

long arc declinecomputed index

Savannah Sparrow has fallen sharply in Boreal Hardwood Transition: down 66% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Savannah Sparrow in Boreal Hardwood Transition is projected to rise about 23% by 2029 — from 4.7 in 2024 to a central estimate of 5.8 (95% range 1.4–10). A 5-year backtest shows a typical error of ±102.8%, with 40% of held-out values landing inside the 95% band.

+23%Change by 2029
5.8Projected 2029 index
1.4–1095% range
±102.8%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
20256.21.811
20266.11.710
20276.01.610
20285.91.510
20295.81.410

Routes In Boreal Hardwood Transition

Routes recording Savannah Sparrow in Boreal Hardwood Transition.
PickfordMICHIGAN632024
GreenbushMINNESOTA422024
Iron RiverWISCONSIN342024
Amnicon FallsWISCONSIN342024
BayfieldWISCONSIN272024
WarroadMINNESOTA252024
DebsMINNESOTA232024
Hubbard LakeMICHIGAN161996
Nett LakeMINNESOTA162024
OntonagonMICHIGAN132019
LudeMINNESOTA122023
CathroMICHIGAN92016
HerronMICHIGAN92016
BerglandMICHIGAN81990
Little ForkMINNESOTA82024
MahtowaMINNESOTA82023
McgregorMINNESOTA82024
GilmanWISCONSIN82024
BootjackMICHIGAN72023
RiggsvilleMICHIGAN72019
FloodwoodMINNESOTA72024
Lake CityMICHIGAN62022
Cedar RunMICHIGAN61999
Walloon Lake 2MICHIGAN62018
WaskishMINNESOTA62024

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