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Species · Louisiana · BBS 2026 Release · 1966–2025

White Ibis Population Trend in Louisiana

All statesWetland birds

White Ibis in Louisiana has surged: up 447% on the route-weighted index since 1969.

+447%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 →
77Routes 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 →
55YearsYears 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 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 →

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 →

White Ibis has surged in Louisiana: up 447% on the route-weighted index since 1969.

White Ibis Population Forecast in Louisiana

If the recent trend holds, White Ibis in Louisiana is projected to rise about 45% by 2030 — from 28 in 2025 to a central estimate of 41 (95% range 8.6–73). A 5-year backtest shows a typical error of ±274.4%, with 60% of held-out values landing inside the 95% band.

+45%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 →
41Projected 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 →
8.6–7395% 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 →
±274.4%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 Ibis in Louisiana is projected to rise about 45% by 2030 — from 28 in 2025 to a central estimate of 41 (95% range 8.6–73). A 5-year backtest shows a typical error of ±274.4%, with 60% 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 →
2026385.971
2027396.671
2028407.272
2029407.973
2030418.673

White Ibis Survey Routes in Louisiana

Routes recording White 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 →
Forked Island41320252008
Ville Platte37620191988
Keystone26520131986
Enterprise24020192011
Esther17820251989
Forked Island 213120112010
Atchafalaya12620251989
Lake Cove11320172008
Richard9820252007
Hackberry 28920252019
Kaplan8020231998
Cheniere7020092009
Ramah6320251988
Freetown4920091984
Morgan City4719861967
Lafitte4519911977
Shaw4320241975
Ltl Chenier3720251986
Goodwill3620232013
Floyd3520022002
Mayflower3420241973
Sabine Nwr 23120172009
Glencoe3020171990
Womack3020252000
Pearl River3020181991

White Ibis Population Trend in Other States

alabamaarkansasfloridageorgiamarylandmississippinew-jerseynorth-carolinaoklahomasouth-carolinatexasvirginia

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