BirdAnalyst
Species · BCR 37 · BBS 2025 Release · 1966–2024

White-faced Ibis In Gulf Coastal Prairie

All regionsGulf Coastal PrairieWetland birds

White-faced Ibis in Gulf Coastal Prairie has edged down: down 13% on the route-weighted index since 1969.

-13%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 →
42Routes In RegionSurvey 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 SignalsNotable 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 Gulf Coastal Prairie. See the full index history below.

White-faced Ibis In Gulf Coastal Prairie Population Forecast

If the recent trend holds, White-faced Ibis in Gulf Coastal Prairie is projected to rise about 280% by 2029 — from 7.3 in 2024 to a central estimate of 28 (95% range 0.00–62). A 5-year backtest shows a typical error of ±106.6%, with 100% of held-out values landing inside the 95% band.

+280%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 →
28Projected 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 →
0.00–6295% 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 →
±106.6%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 Gulf Coastal Prairie is projected to rise about 280% by 2029 — from 7.3 in 2024 to a central estimate of 28 (95% range 0.00–62). A 5-year backtest shows a typical error of ±106.6%, 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 →
2025280.0062
2026280.0062
2027280.0062
2028280.0062
2029280.0062

Routes In Gulf Coastal Prairie

Routes recording White-faced Ibis in Gulf Coastal Prairie.
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 →
CreoleLOUISIANA1521980
KaplanLOUISIANA852023
Ville PlatteLOUISIANA612019
MamouLOUISIANA461968
WinnieTEXAS452024
San PedroTEXAS431999
EstherLOUISIANA342024
Gran ChenierLOUISIANA301980
WoodlawnLOUISIANA282021
Ltl ChenierLOUISIANA242024
GlencoeLOUISIANA222001
RichardLOUISIANA172024
Loyola Beach 2TEXAS142021
MauriceLOUISIANA122024
Forked IslandLOUISIANA122024
Forked Island 2LOUISIANA122011
Moon LakeTEXAS112011
Vinton 2LOUISIANA92016
ChinquapinTEXAS92021
Loyola BeachTEXAS82008
Bayside 2TEXAS72004
Goliad PrairieTEXAS72013
KatyTEXAS62024
DanburyTEXAS52022
Lag AtascosaTEXAS42017

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