Spotted the momma bird! It's a Carolina wren, and.........what, no, surely not.
https://www.allaboutbirds.org/guide/Carolina_Wren/lifehistory
https://www.allaboutbirds.org/guide/Carolina_Wren/lifehistory
Baby bird package check! Still full of baby birds. (Only going to do this every third day from now on. Babies be babies.)