BirdAnalyst
Species · Louisiana · BBS 2026 Release · 1966–2025

White-faced Ibis Population Trend in Louisiana

All statesWetland birds

White-faced Ibis in Louisiana has increased: up 41% on the route-weighted index since 1970.

+41%Since 1970TrendPercent 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 →
33Routes 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 →
51YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable White-faced Ibis 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 →

No notable trend signals for White-faced Ibis in Louisiana. See the full index history below.

White-faced Ibis Population Forecast in Louisiana

If the recent trend holds, White-faced Ibis in Louisiana is projected to rise about 894% by 2030 — from 1.3 in 2025 to a central estimate of 13 (95% range 0.00–29). A 5-year backtest shows a typical error of ±333.9%, with 100% of held-out values landing inside the 95% band.

+894%Change by 2030TrendPercent 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 →
13Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–2995% 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 →
±333.9%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, White-faced Ibis in Louisiana is projected to rise about 894% by 2030 — from 1.3 in 2025 to a central estimate of 13 (95% range 0.00–29). A 5-year backtest shows a typical error of ±333.9%, with 100% of held-out values landing inside the 95% band.19672030
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 →
2026120.0029
2027130.0029
2028130.0029
2029130.0029
2030130.0029

White-faced Ibis Survey Routes in Louisiana

Routes recording White-faced Ibis 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 →
Creole15219801967
Kaplan8520231998
Ville Platte6120191988
Mamou4619681968
Port Allen3520242013
Gran Chenier3019801967
Woodlawn2820212008
Flat Creek2520002000
Glencoe2220012001
Morgan City1620142012
Hackberry 21620252018
De Quincy1520042004
Ltl Chenier1320251988
Forked Island 21220112010
Maurice1220241988
Vinton 21020252016
Keystone820121991
Frogmore720242006
Esther620251988
Atchafalaya520152009
Ramah420212011
Kraemer420102010
Lafitte319671967
Mayflower320232022
Richard320251998

White-faced Ibis Population Trend in Other States

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Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.