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Species · Louisiana · BBS 2025 Release · 1966–2024

Blue-winged Teal Population Trend in Louisiana

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Blue-winged Teal in Louisiana has collapsed: down 96% on the route-weighted index since 1975.

-96%Since 1975
15Routes In State
18Years

Notable Blue-winged Teal Trends in Louisiana

long arc declinecomputed index

Blue-winged Teal has collapsed in Louisiana: down 96% on the route-weighted index since 1975.

Blue-winged Teal Population Forecast in Louisiana

If the recent trend holds, Blue-winged Teal in Louisiana is projected to fall about 100% by 2028 — from 0.10 in 2023 to a central estimate of 0.00 (95% range 0.00–2.5). A 5-year backtest shows a typical error of ±655.5%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2028
0.00Projected 2028 index
0.00–2.595% range
±655.5%Backtest error
19672028
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
20240.000.002.5
20250.000.002.5
20260.000.002.5
20270.000.002.5
20280.000.002.5

Blue-winged Teal Survey Routes in Louisiana

Routes recording Blue-winged Teal in Louisiana.
Gran Chenier10219711971
Ltl Chenier1820141991
Maurice420232016
Mayflower419751975
Kaplan420192013
Hackberry319671967
Sabine Nwr 2320142014
De Quincy320152015
Creole219791971
Sabine Nwr219891989
Port Allen220122012
Richard220121998
Forked Island220122012
Esther219941994
Ville Platte120072007

Blue-winged Teal Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradodelawarefloridaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-mexiconew-yorknorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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