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

Field Sparrow In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionGeneralists

Field Sparrow in Prairie Hardwood Transition has fallen sharply: down 63% on the route-weighted index since 1968.

-63%Since 1968
157Routes In Region
58Years

Notable Signals

long arc declinecomputed index

Field Sparrow has fallen sharply in Prairie Hardwood Transition: down 63% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Field Sparrow in Prairie Hardwood Transition is projected to fall about 39% by 2029 — from 4.1 in 2024 to a central estimate of 2.5 (95% range 0.60–4.4). A 5-year backtest shows a typical error of ±31.6%, with 100% of held-out values landing inside the 95% band.

-39%Change by 2029
2.5Projected 2029 index
0.60–4.495% range
±31.6%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
20253.01.14.9
20262.90.974.8
20272.80.854.7
20282.60.734.6
20292.50.604.4

Routes In Prairie Hardwood Transition

Routes recording Field Sparrow in Prairie Hardwood Transition.
EllisINDIANA382024
Drayton PlnsMICHIGAN351987
GuilfordILLINOIS252023
Sherburne NrMINNESOTA212024
KnoxINDIANA152024
BriggsvilleWISCONSIN152024
HowardsvilleMICHIGAN142024
WhitewaterMINNESOTA132000
HatfieldWISCONSIN131998
Lake GalenaILLINOIS122021
PackertownINDIANA122004
AlmenaMICHIGAN122015
RemusMICHIGAN112024
Barry S.G.A.MICHIGAN112012
CaledoniaMINNESOTA112012
Caledonia 2MINNESOTA112024
EsdaileWISCONSIN112024
WiotaWISCONSIN112024
Money CreekMINNESOTA102023
Packertown 2INDIANA92024
GalesburgMICHIGAN92024
FowlervilleMICHIGAN92019
WaldenburgMICHIGAN92000
Chatfield 2MINNESOTA92024
GilmantonWISCONSIN92024

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