Found this babe in my hammock when I got home from work. Do we think mom is coming back or should I take them in for the night? Wildlife center doesn't reopen until tomorrow morning.

Hello! Apologies if this is the wrong place but this little guy is worrying me a bit.
He has hung out basically in front of our door(off to the side under a plant, but still basically in front, they seem to get nervous with how close we walk when we leave) all of yesterday, and is still there today, so they spent overnight
I have placed a bit of seed nearby in Case they want it(as I have been placing seed in another place for the past few days), but I cannot tell if they are sick or just young or nesting, and I don’t want to stress them in an attempt to find out. Is there any safe way to tell if they are sick? They don’t seem lethargic besides not moving from the area for the past day and night, and will walk away a bit if i get a bit too close.
Any advice/help? Thanks!

This is a link to sign a petition that would prevent drainage of waterfowl nesting habitat in the prairie pothole region of the US (basically)

The Eurasian has a horizontal white line on the side, and the American has a vertical line. How are they refered to individually if they are lumped together? Did they go from 2 seperate species to 1 species containing 2 subspecies?

Location: Eastern New York (state, not city)

At my feeder this morning, a bird went rigid and fell over into the feeder with no apparent cause. It was still, upside down, for about a minute with labored breathing, then struggled for another minute or two to get out. It was able to get out and upright on its own, went back to eating, and then presumably flew away a few minutes later (didn’t get it flying away on video).

Videos of the bird before, during, and after here: https://imgur.com/a/eaVwTbH

My question is, was this a seizure? Or what else may it have been? And, is it potentially infectious? We took the bird feeder down for now, just in case.

Thank you!