BirdAnalyst
Species · Wyoming · BBS 2025 Release · 1966–2024

Great Blue Heron Population Trend in Wyoming

All statesWetland birds

Great Blue Heron in Wyoming has increased: up 39% on the route-weighted index since 1974.

+39%Since 1974
88Routes In State
51Years

Notable Great Blue Heron Trends in Wyoming

No notable trend signals for Great Blue Heron in Wyoming. See the full index history below.

Great Blue Heron Population Forecast in Wyoming

If the recent trend holds, Great Blue Heron in Wyoming is projected to fall about 78% by 2029 — from 0.26 in 2024 to a central estimate of 0.06 (95% range 0.00–1.8). A 5-year backtest shows a typical error of ±27.1%, with 100% of held-out values landing inside the 95% band.

-78%Change by 2029
0.06Projected 2029 index
0.00–1.895% range
±27.1%Backtest error
19682029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.160.001.9
20260.140.001.9
20270.110.001.9
20280.080.001.8
20290.060.001.8

Great Blue Heron Survey Routes in Wyoming

Routes recording Great Blue Heron in Wyoming.
Green River1319841977
Lusk720001999
Wyarno620171990
Daniel619881980
Yellowstone620221987
Cody520241983
Basin520171972
Seely520001992
Otto420081974
Big Sandy420081990
Soda Well320191987
Anchor320162016
Rawlins320051989
Moran320162002
Ne Entrance219891988
Colter Bay219981994
Brookhurst220171968
Dwyer220161995
Cumberland220191988
Crazy Woman220142010
Arvada220161982
Recluse220161988
Alpine220241979
Mayoworth220181982
Newcastle220242021

Great Blue Heron Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsin

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