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Species · Mississippi · BBS 2025 Release · 1966–2024

Snowy Egret Population Trend in Mississippi

All statesWetland birds

Snowy Egret in Mississippi has surged: up 803% on the route-weighted index since 1979.

+803%Since 1979TrendPercent 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 →
19Routes 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 →
36YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Snowy Egret Trends in MississippiNotable 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: up 802% on the route-weighted index since 1979.

Snowy Egret Population Forecast in Mississippi

If the recent trend holds, Snowy Egret in Mississippi is projected to rise about 22% by 2029 — from 0.63 in 2024 to a central estimate of 0.77 (95% range 0.00–1.6). A 5-year backtest shows a typical error of ±30.8%, with 100% of held-out values landing inside the 95% band.

+22%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 →
0.77Projected 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 →
0.00–1.695% 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 →
±30.8%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 is projected to rise about 22% by 2029 — from 0.63 in 2024 to a central estimate of 0.77 (95% range 0.00–1.6). A 5-year backtest shows a typical error of ±30.8%, 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 →
20250.730.001.6
20260.740.001.6
20270.750.001.6
20280.760.001.6
20290.770.001.6

Snowy Egret Survey Routes in Mississippi

Routes recording Snowy Egret in Mississippi.
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 →
Tippo1320092009
Latimer1120042003
Eagle Lake720242012
Panther Swamp Nwr620182018
Moon420092009
Delta N.F.320211997
Tchula 3320241995
Beverly219791966
Isola220221996
Macon220242002
Waynesboro220092002
Fort Adams219971991
Dundee120152011
Tallahatchie120211996
Columbia119811978
Cybur120191984
Benndale119981996
Tchula 2119891989
Necaise120162016

Snowy Egret Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianakansaslouisianamainemarylandmassachusettsmissourinebraskanevadanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaoklahomaoregonrhode-islandsouth-carolinasouth-dakotatennesseetexasutahvirginiawisconsinwyoming

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