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Species · Louisiana · BBS 2025 Release · 1966–2024

Pied-billed Grebe Population Trend in Louisiana

All statesWetland birds

Pied-billed Grebe in Louisiana has increased: up 47% on the route-weighted index since 1988.

+47%Since 1988
26Routes In State
34Years

Notable Pied-billed Grebe Trends in Louisiana

No notable trend signals for Pied-billed Grebe in Louisiana. See the full index history below.

Pied-billed Grebe Population Forecast in Louisiana

If the recent trend holds, Pied-billed Grebe in Louisiana is projected to fall about 41% by 2029 — from 0.49 in 2024 to a central estimate of 0.29 (95% range 0.00–0.64). A 5-year backtest shows a typical error of ±119.3%, with 100% of held-out values landing inside the 95% band.

-41%Change by 2029
0.29Projected 2029 index
0.00–0.6495% range
±119.3%Backtest error
19752029
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
20250.280.000.63
20260.280.000.63
20270.280.000.63
20280.290.000.64
20290.290.000.64

Pied-billed Grebe Survey Routes in Louisiana

Routes recording Pied-billed Grebe in Louisiana.
Maurice1720241988
Richard720182009
Ltl Chenier520231988
Keystone420082000
Shaw420141987
Vinton 2320232011
Esther320242007
Sabine Nwr319931993
Creole219751975
De Ridder220032003
Forked Island 2220112011
Forked Island220172010
Ville Platte220162008
Delhi220192015
Tensas Nwr120192019
Atchafalaya120012001
Baton Rouge120212010
Ivan120062000
Hackberry120132013
Ramah120081994
Kaplan120232001
Woodlawn120212008
Port Allen120132001
Sabine Nwr 2120122012
Natchez120121997

Pied-billed Grebe Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwisconsinwyoming

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