What nest?

I posted a picture of this nest the previous week and I got some results.

1: It’s not an abandoned HummingBird nest.
2: It could be a sparrow nest, either song or swamp sparrow.
3: It would be easier if I put a small object in the cup of the nest to determine the cup size.

If you have any ideas, please leave a comment. The nest is in swamp land/marsh and is roughly two feet off the ground.