If it were me, I'd just build it a nice little home out back away from prying eyes. It's got a better shot living in a nice comfortable environment than out in the wild anyway. Inside=safe & sound, out on it's own=CATFOOD.
I've never been one to check the regulations, anyway. It wouldn't do for me to get my hands on a baby deer!---I can see it now, the game warden comes, and I say, "Wow...I thought it was a dog."
Well from the little bit I know my first thought was somebody's baby turkey escaped. Now that you have rescued it and can't find it's owner
you are kind of obligated to raise it.
Also remember these very important things. DON'T ASK DON'T TELL, and it is easier to beg forgiveness than to recieve permission.
we had a couple of 'wild' turkeys that were not really wild...but the offspring of wild (couple generations down) ... long story short, but a guy had wild turkeys (legal or illegal I don't know) on his ranch and raised some of the babies, then they had babies and so on and so on...well the turkeys weren't being cared for properly, so we 'adopted' a pair...and they had babies and roamed free in our vineyard...until a bobcat or something got them...and the babies did look like this little chick...I just noticed a couple wild turkeys coming out of our vineyard and into our back yard today! So I'm wondering if some of the chicks have made it or if they are totally wild ones not related at all??? Either way having turkeys gobble and roam the property is pretty cool!
Good luck with your little baby...I would venture to guess you can't "put it back" now, so you probably need to raise it and care for it properly.
(I see a turkey chick order coming so it has 'friends' in it's brooder) LOL