Species · Missouri · BBS 2025 Release · 1966–2024
Black-crowned Night Heron Population Trend in Missouri
Black-crowned Night Heron in Missouri has fallen sharply: down 74% on the route-weighted index since 1970.
-74%Since 1970
7Routes In State
12Years
Notable Black-crowned Night Heron Trends in Missouri
long arc declinecomputed index
Black-crowned Night Heron has fallen sharply in Missouri: down 74% on the route-weighted index since 1970.
Black-crowned Night Heron Survey Routes in Missouri
| Blodgett | 3 | 2015 | 2015 |
| Deventer | 2 | 1993 | 1969 |
| Washington | 2 | 1968 | 1968 |
| Pulaski | 1 | 2019 | 2019 |
| New Point | 1 | 2005 | 2005 |
| Watson | 1 | 2019 | 2019 |
| Rockingham | 1 | 1997 | 1975 |
Black-crowned Night Heron Population Trend in Other States
alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.