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Species · BCR 26 · BBS 2026 Release · 1966–2025

Snowy Egret In Mississippi Alluvial Valley

All regionsMississippi Alluvial ValleyWetland birds

Snowy Egret in Mississippi Alluvial Valley has surged: up 25× on the route-weighted index since 1975.

25×Since 1975TrendPercent 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 →
50Routes 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 →
50YearsYears 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 →

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 →

Snowy Egret has surged in Mississippi Alluvial Valley: up 25× on the route-weighted index since 1975.

Snowy Egret In Mississippi Alluvial Valley Population Forecast

If the recent trend holds, Snowy Egret in Mississippi Alluvial Valley is projected to rise about 374% by 2030 — from 0.64 in 2025 to a central estimate of 3.0 (95% range 0.00–13). A 5-year backtest shows a typical error of ±173%, with 100% of held-out values landing inside the 95% band.

+374%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 →
3.0Projected 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 →
0.00–1395% 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 →
±173%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, Snowy Egret in Mississippi Alluvial Valley is projected to rise about 374% by 2030 — from 0.64 in 2025 to a central estimate of 3.0 (95% range 0.00–13). A 5-year backtest shows a typical error of ±173%, with 100% of held-out values landing inside the 95% band.19732030
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 →
20263.00.0013
20273.00.0013
20283.00.0013
20293.00.0013
20303.00.0013

Routes In Mississippi Alluvial Valley

Routes recording Snowy Egret in Mississippi Alluvial Valley.
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 →
Rayville 2LOUISIANA472023
ShawLOUISIANA212024
TiptonvilleTENNESSEE212011
GibsonLOUISIANA112015
HarrisburgARKANSAS102012
FreetownLOUISIANA82000
Morgan CityLOUISIANA81986
CarlisleLOUISIANA61988
Port AllenLOUISIANA62024
Panther Swamp NwrMISSISSIPPI62018
RamahLOUISIANA52025
Morgan CityLOUISIANA52022
River RoadLOUISIANA52025
AtchafalayaLOUISIANA52019
MoonMISSISSIPPI42009
DeventerMISSOURI42011
UlmARKANSAS32024
BrousvilleLOUISIANA32023
TransylvaniaLOUISIANA32025
KraemerLOUISIANA32025
Tchula 3MISSISSIPPI32024
Delta N.F.MISSISSIPPI32021
EudoraARKANSAS22010
KeystoneLOUISIANA22013
MayflowerLOUISIANA22025

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