Species · BBS 2025 Release · 1966–2024

Great Egret

Great Egret has edged down: down 10% on the route-weighted index since 1968.

About the Great Egret

The Great Egret (Ardea alba) is a North American member of the Herons, Egrets & Bitterns (Ardeidae). In this analysis it is grouped with the wetland birds.

Size
12–51 in long (30–130 cm) — a long-legged wader (typical for the family)
Habitat
Marshes, ponds, lakeshores and other freshwater wetlands.
Diet
Aquatic invertebrates, small fish, frogs and plant matter.
Range
Recorded on 1,300 Breeding Bird Survey routes across 47 states, most concentrated in the Southeastern Coastal Plain.
Family
Ardeidae · Wetland birds

Notable Great Egret TrendsNotable 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 Great Egret. See the full index history below.

Great Egret Population Forecast

If the recent trend holds, Great Egret is projected to rise about 69% by 2029 — from 0.72 in 2024 to a central estimate of 1.2 (95% range 0.66–1.8). A 5-year backtest shows a typical error of ±69.2%, with 40% of held-out values landing inside the 95% band.

If the recent trend holds, Great Egret is projected to rise about 69% by 2029 — from 0.72 in 2024 to a central estimate of 1.2 (95% range 0.66–1.8). A 5-year backtest shows a typical error of ±69.2%, with 40% 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 →
20251.20.621.8
20261.20.631.8
20271.20.641.8
20281.20.651.8
20291.20.661.8

Where the Great Egret Is Detected

BBS routes recording Great Egret, sized by most recent count.

Great Egret Population Trend by State

Great Egret population trend by state.
TrendPercent 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 →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →Survey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
Alabama+840%196883
Arizona-83%198314
Arkansas+551%196935
California43×197181
Coloradoinsufficient datan/a4
Connecticutinsufficient datan/a3
Delaware+404%196812
Florida-62%1968124
Georgia-88%196879
Idahoinsufficient datan/a2
Illinois+33%196849
Indiana-19%199312
Iowainsufficient datan/a10
Kansas41×197724
Kentucky-3%198810
Louisiana+244%196997
Maineinsufficient datan/a1
Maryland+117%196825
Massachusetts+41%19887
Michigan+11%199919
Minnesota-35%197034
Mississippi+850%197061
Missouri+60%197426
Montanainsufficient datan/a1
Nebraskainsufficient datan/a6
Nevada-29%198815
New Jersey-13%197119
New Mexico-13%19964
New York+128%19728
North Carolina+194%196849
North Dakota+363%199813
Ohio+3%197011
Oklahoma-6%196952
Oregon-67%197320
Pennsylvania-2%198912
Rhode Islandinsufficient datan/a2
South Carolina-52%196829
South Dakota+73%198915
Tennessee+644%197417
Texas-3%1969152
Utahinsufficient datan/a2
Vermontinsufficient datan/a1
Virginia-2%197221
Washington+179%19975
West Virginiainsufficient datan/a2
Wisconsin+194%196831
Wyominginsufficient datan/a1

Great Egret Population Trend by Region

Bird Conservation Regions are the ecological unit for trends.

Great Egret population trend by Bird Conservation Region.
TrendPercent 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 →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →Survey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
Northern Pacific Rainforest+211%199011
Great Basin-59%197446
Prairie Potholes+760%197847
Shortgrass Prairie+5%20028
Central Mixed Grass Prairie+37%196940
Edwards Plateau+4%19988
Oaks and Prairies+31%197067
Eastern Tallgrass Prairie+117%196893
Prairie Hardwood Transition+34%196869
Central Hardwoods17×197441
West Gulf Coastal Plain / Ouachitas+66%196992
Mississippi Alluvial Valley+445%196967
Southeastern Coastal Plain-50%1968306
Appalachian Mountains+868%197232
Piedmont+20%197841
New England / Mid-Atlantic Coast+135%196872
Peninsular Florida-62%196880
Coastal California40×197156
Sonoran and Mojave Deserts-57%197621
Chihuahuan Desert+75%199610
Tamaulipan Brushlands+23%197622
Gulf Coastal Prairie+125%196948

Great Egret Conservation Status

Our route-weighted index shows it down about 10% since 1968.

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. Trend is a route-weighted relative-abundance index, not an absolute population.