Here ID HY (hatch year) white waders w/o size reference:

Here a Snowy with a dark-tipped bill:

Here a Little Blue eating a Western Lesser Siren:

Apex Egret:
Note all the Horse hair showing on this Chipping Sparrow nest:
Hooded Crow like:
Pair of Kestrels:
Male snatching a dragonfly:

Bill Rudden
St. Louis
1. Great Egret (head looks like a large Cattle Egret)
2. Little Blue

The Audubon Society of Missouri's Wild Bird Discussion Forum
List archives: https://po.missouri.edu/archives/mobirds-l.html