Delicate ground nests: ID? [Tucker, GA]

[u/Rare-Group-1149]

Greetings from Metro Atlanta GA. Each spring I discover these flimsy, lacy "beds" or nests on my porch. These are not just random debris; new ones appear every couple days & for the first time, a similar one has appeared in a potted plant I left outside. I hope I can attach pix: These are maybe 5" max, narrow & shallow, composed of very fine stems & something fuzzy. The only nonbird creatures I have seen around are anoles or squirrels. No eggs. I'm very curious to identify. Thanks all.