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

Brown-headed Cowbird In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionGeneralists

Brown-headed Cowbird in Prairie Hardwood Transition has edged down: down 24% on the route-weighted index since 1968.

-24%Since 1968
161Routes In Region
58Years

Notable Signals

No notable trend signals for Brown-headed Cowbird in Prairie Hardwood Transition. See the full index history below.

Forecast

If the recent trend holds, Brown-headed Cowbird in Prairie Hardwood Transition is projected to stay roughly flat through 2029, near 15 (95% range 11–19). A 5-year backtest shows a typical error of ±4.4%, with 100% of held-out values landing inside the 95% band.

-7%Change by 2029
15Projected 2029 index
11–1995% range
±4.4%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
2025151119
2026151119
2027151119
2028151119
2029151119

Routes In Prairie Hardwood Transition

Routes recording Brown-headed Cowbird in Prairie Hardwood Transition.
GrimmsWISCONSIN962021
Sherburne NrMINNESOTA542024
PardeevilleWISCONSIN542024
PackertownINDIANA502004
Le CenterMINNESOTA492023
AnnatonWISCONSIN482024
KnappMINNESOTA472024
New LondonMINNESOTA442024
Pt WashingtnWISCONSIN432024
WhitewaterMINNESOTA412000
ParisWISCONSIN412024
HebronWISCONSIN362024
GuilfordILLINOIS352023
KielWISCONSIN352022
RichmondMICHIGAN342024
MinnetonkaMINNESOTA332024
WeyerhauserWISCONSIN332024
Brook ParkMINNESOTA322024
CumberlandWISCONSIN322024
KewannaINDIANA302022
EllisINDIANA302024
HartlandMICHIGAN302011
Hazel GreenWISCONSIN302024
St CharlesMICHIGAN292019
Bell OakMICHIGAN292008

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