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Species · Louisiana · BBS 2025 Release · 1966–2024

Wood Duck Population Trend in Louisiana

All statesWaterfowl

Wood Duck in Louisiana has surged: up 213% on the route-weighted index since 1969.

+213%Since 1969TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
75Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Wood Duck Trends in LouisianaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Wood Duck has surged in Louisiana: up 213% on the route-weighted index since 1969.

Wood Duck Population Forecast in Louisiana

If the recent trend holds, Wood Duck in Louisiana is projected to rise about 53% by 2029 — from 0.98 in 2024 to a central estimate of 1.5 (95% range 0.44–2.5). A 5-year backtest shows a typical error of ±49.7%, with 100% of held-out values landing inside the 95% band.

+53%Change by 2029TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
1.5Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.44–2.595% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±49.7%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Wood Duck in Louisiana is projected to rise about 53% by 2029 — from 0.98 in 2024 to a central estimate of 1.5 (95% range 0.44–2.5). A 5-year backtest shows a typical error of ±49.7%, with 100% of held-out values landing inside the 95% band.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 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20251.40.392.5
20261.50.402.5
20271.50.422.5
20281.50.432.5
20291.50.442.5

Wood Duck Survey Routes in Louisiana

Routes recording Wood Duck in Louisiana.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Carterville1119921992
Lafitte619871969
Baton Rouge620241995
Maurice520242001
De Quincy520191998
Bickham420221984
Cypress419871972
Trout420122008
Richard420242014
Morgan City420142011
Kraemer420241997
Cheniere420241985
Junior319911988
Morgan City319861967
River Road320241987
Keystone320131980
Shaw320241967
Fishville320101998
Fillmore319791979
Franklinton320082008
Many319891989
Transylvania320172000
Womack320072007
Slidell319871987
Ville Platte320192009

Wood Duck Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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