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

Pied-billed Grebe In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionWetland birds

Pied-billed Grebe in Prairie Hardwood Transition has fallen sharply: down 69% on the route-weighted index since 1968.

-69%Since 1968
70Routes In Region
58Years

Notable Signals

long arc declinecomputed index

Pied-billed Grebe has fallen sharply in Prairie Hardwood Transition: down 69% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Pied-billed Grebe in Prairie Hardwood Transition is projected to fall about 17% by 2029 — from 0.11 in 2024 to a central estimate of 0.09 (95% range 0.00–0.23). A 5-year backtest shows a typical error of ±125.9%, with 100% of held-out values landing inside the 95% band.

-17%Change by 2029
0.09Projected 2029 index
0.00–0.2395% range
±125.9%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
20250.100.000.24
20260.100.000.24
20270.100.000.24
20280.090.000.23
20290.090.000.23

Routes In Prairie Hardwood Transition

Routes recording Pied-billed Grebe in Prairie Hardwood Transition.
HoltMICHIGAN71981
Fall RiverWISCONSIN72019
FestinaIOWA52005
Sherburne NrMINNESOTA52024
Columbia CtyINDIANA41998
HudsonWISCONSIN32016
LawrenceMICHIGAN22009
HowardsvilleMICHIGAN22009
Barry S.G.A.MICHIGAN22005
MinnetonkaMINNESOTA22021
PrincetonMINNESOTA22016
KnappMINNESOTA22024
Le CenterMINNESOTA22016
GlenwoodMINNESOTA22019
ClintonvilleWISCONSIN22024
PardeevilleWISCONSIN21994
PrincetonWISCONSIN22005
EdenWISCONSIN21973
KnoxINDIANA12012
PackertownINDIANA11973
EllisINDIANA11988
LagrangeINDIANA12011
Indiana DuneINDIANA12002
Big Blue LkMICHIGAN12024
NashvilleMICHIGAN11981

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