BirdAnalyst
Species · BCR 27 · BBS 2025 Release · 1966–2024

White Ibis In Southeastern Coastal Plain

All regionsSoutheastern Coastal PlainWetland birds

White Ibis in Southeastern Coastal Plain has declined: down 45% on the route-weighted index since 1968.

-45%Since 1968TrendPercent 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 →
188Routes 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 →
58YearsYears 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 Ibis in Southeastern Coastal Plain. See the full index history below.

Forecast

If the recent trend holds, White Ibis in Southeastern Coastal Plain is projected to stay roughly flat through 2029, near 2.7 (95% range 0.03–5.4). A 5-year backtest shows a typical error of ±31.2%, with 100% of held-out values landing inside the 95% band.

+1%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 →
2.7Projected 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 →
0.03–5.495% 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 →
±31.2%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 Southeastern Coastal Plain is projected to stay roughly flat through 2029, near 2.7 (95% range 0.03–5.4). A 5-year backtest shows a typical error of ±31.2%, with 100% of held-out values landing inside the 95% band.19662029
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 →
20252.70.015.3
20262.70.015.3
20272.70.025.3
20282.70.025.3
20292.70.035.4

Routes In Southeastern Coastal Plain

Routes recording White Ibis in Southeastern Coastal Plain.
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 →
ShallotteNORTH-CAROLINA1641991
NewtonGEORGIA1092024
Thornton RoadGEORGIA1092024
AppletonALABAMA752018
WhitehallALABAMA672024
Ft Waltn BchFLORIDA551992
Colonels IslandGEORGIA502023
Alabama PtALABAMA431990
Milltail CrNORTH-CAROLINA382021
SandersonFLORIDA362021
LathamALABAMA351997
PungoVIRGINIA352014
New HopeFLORIDA332011
Pearl RiverLOUISIANA302018
SupplyNORTH-CAROLINA282024
NixonvilleSOUTH-CAROLINA281992
NixvilleSOUTH-CAROLINA282017
PlettenbergLOUISIANA261988
CouncilGEORGIA242022
TarverGEORGIA232024
Kiawah IslandSOUTH-CAROLINA222024
LacombeLOUISIANA211969
BeatriceALABAMA202007
FolkstonGEORGIA202022
Green SwampNORTH-CAROLINA202006

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