Midafternoon I checked on the waders around the Fish Hatchery in the NE corner of Forest Park.  There I refound an adult Yellow-Crowned Night Heron (a stunning look across a 15 foot channel along the biking trail south of the ponds), an adult Black-crowned Night Heron, a fishing first summer BC, a Green Heron, and a Great Egret, all except the Green spending some time in the big Bald Cypresses where they have been nesting..
A Forest Park map in pdf format can be found here::
Jackie Chain
St Louis County
The Audubon Society of Missouri's Wild Bird Discussion Forum
List archives: https://po.missouri.edu/archives/mobirds-l.html