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

Green Heron Population Trend in Missouri

All statesWetland birds

Green Heron in Missouri has fallen sharply: down 50% on the route-weighted index since 1969.

-50%Since 1969
84Routes In State
57Years

Notable Green Heron Trends in Missouri

long arc declinecomputed index

Green Heron has fallen sharply in Missouri: down 50% on the route-weighted index since 1969.

Green Heron Population Forecast in Missouri

If the recent trend holds, Green Heron in Missouri is projected to fall about 42% by 2029 — from 0.57 in 2024 to a central estimate of 0.33 (95% range 0.00–0.79). A 5-year backtest shows a typical error of ±46.2%, with 100% of held-out values landing inside the 95% band.

-42%Change by 2029
0.33Projected 2029 index
0.00–0.7995% range
±46.2%Backtest error
19672029
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
20250.380.000.84
20260.360.000.83
20270.350.000.81
20280.340.000.80
20290.330.000.79

Green Heron Survey Routes in Missouri

Routes recording Green Heron in Missouri.
Pulaski620151975
Rockingham419991971
Stet419901972
Sedalia420241991
Milford420242018
Sni Mills319901968
Sticklervill320121972
Trenton320011975
Kearney320241994
Gildehouse319891979
Auburn320242014
Mincy320242019
Cp Girardeau220231968
Cascade220241970
Ironton219801973
Wesco220231974
Clementine219961975
Cole Camp219891974
Rensselaer220071984
Bolckow219901967
Marshfield220171994
Osage Beach220241999
Graniteville220231982
Woodlandville220242013
Lincoln220192018

Green Heron Population Trend in Other States

alabamaarizonaarkansascaliforniaconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippinebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawashingtonwest-virginiawisconsin

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