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

Pied-billed Grebe In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionWetland birds

Pied-billed Grebe in Boreal Hardwood Transition has collapsed: down 82% on the route-weighted index since 1969.

-82%Since 1969
57Routes In Region
56Years

Notable Signals

long arc declinecomputed index

Pied-billed Grebe has collapsed in Boreal Hardwood Transition: down 82% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Pied-billed Grebe in Boreal Hardwood Transition is projected to stay roughly flat through 2029, near 0.08 (95% range 0.00–0.23). A 5-year backtest shows a typical error of ±299.8%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.08Projected 2029 index
0.00–0.2395% range
±299.8%Backtest error
19672029
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
20250.090.000.23
20260.090.000.23
20270.080.000.23
20280.080.000.23
20290.080.000.23

Routes In Boreal Hardwood Transition

Routes recording Pied-billed Grebe in Boreal Hardwood Transition.
Bear LakeMICHIGAN111969
Seney NwrMICHIGAN42018
Pine RiverMICHIGAN32021
GreenbushMINNESOTA32016
BerglandMICHIGAN21993
ShingletonMICHIGAN21990
MuskallongeMICHIGAN22019
RiggsvilleMICHIGAN21985
Wigwam BayMINNESOTA22019
BackusMINNESOTA22022
LudeMINNESOTA22009
BrainerdMINNESOTA22011
BigforkMINNESOTA21998
Cass LakeMINNESOTA22016
MinongWISCONSIN21998
ExelandWISCONSIN22003
Rib LakeWISCONSIN22015
BootjackMICHIGAN11993
Ned LakeMICHIGAN12018
Crystal FlsMICHIGAN12017
Gibbs CityMICHIGAN11998
CreightonMICHIGAN12006
TahquamenonMICHIGAN12002
Lake CityMICHIGAN12006
IronsMICHIGAN11977

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