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

Clay-colored Sparrow In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionGeneralists

Clay-colored Sparrow in Boreal Hardwood Transition has declined: down 33% on the route-weighted index since 1968.

-33%Since 1968
104Routes In Region
58Years

Notable Signals

No notable trend signals for Clay-colored Sparrow in Boreal Hardwood Transition. See the full index history below.

Forecast

If the recent trend holds, Clay-colored Sparrow in Boreal Hardwood Transition is projected to rise about 53% by 2029 — from 2.1 in 2024 to a central estimate of 3.2 (95% range 1.8–4.5). A 5-year backtest shows a typical error of ±72.2%, with 20% of held-out values landing inside the 95% band.

+53%Change by 2029
3.2Projected 2029 index
1.8–4.595% range
±72.2%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
20253.21.84.6
20263.21.84.6
20273.21.84.5
20283.21.84.5
20293.21.84.5

Routes In Boreal Hardwood Transition

Routes recording Clay-colored Sparrow in Boreal Hardwood Transition.
BagleyMINNESOTA322006
GreenbushMINNESOTA242024
DebsMINNESOTA182024
Iron RiverWISCONSIN152024
PickfordMICHIGAN142024
WarroadMINNESOTA112024
Little ForkMINNESOTA92024
BrainerdMINNESOTA82024
BayfieldWISCONSIN82024
Pine RiverMINNESOTA72024
Amnicon FallsWISCONSIN72024
HerronMICHIGAN62016
LudeMINNESOTA62023
Nett LakeMINNESOTA62024
WilsonMICHIGAN52010
BackusMINNESOTA52024
McgregorMINNESOTA52024
CathroMICHIGAN42016
Union TwpWISCONSIN42024
CromwellMINNESOTA32023
Sherry LakeMINNESOTA32022
WaskishMINNESOTA32024
MahtowaMINNESOTA32023
MinongWISCONSIN32023
WausaukeeWISCONSIN32023

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