I think its a female Common Yellowthroat.
It was going from branch to branch looking for food. I watched it hop from branch to branch and made a big circle. Then it did the same think on another tree.

Or a Yellow Warbler.

I am inclined toward the female Yellow Warbler ID. The bird in your photo has a head that is entirely yellow. The female Common Yellowthroat has a head that is more gray colored, as can be seen in this photo of a recently deceased bird I found a couple years ago:

Both beautiful birds. Thx.

I’m going to guess yellow warbler - telltale for me are the red streaks around neck and top of breast. Canada warbler also has a “necklace” but it is blotchier and darker and dark top feathers. I identify the female yellowthroat as duskier colored. I am not good at all with female warbler ID.

House wrens singing vigorously! And winter wrens in cook county. To my ear, the winter wren is the “birdsong of the north”. That was a fun, different thread. So gratifying to read so many responses to special bird songs!

Thanks for the picture, airmorse!