Christine, we have tons of Blue Jays here; I've only seen a few seem with the molting/bald heads.
Elaine, I love the Cardinals and those juvie's are just too cute! I like that feeder in your second photo! My DH built me a ground feeder years ago, four cedar legs and a square frame top that he stapled some sort of screening to. It was a great feeder, it kept the seed dry and a lot of birds used it. I don't know what ever happened to that feeder, probably got lost in the move four years ago ... I think need to get him to make me another one!
Ann, thank you! The Limpkin is a new one for me, had never seen one until a few weeks back! I read that their main diet ingredient is apple snails so I'm assuming that's what they are finding along the waters edge. I didn't know until today that they dunk their heads under the water like that to find food.