robbuckbirder's Identifications

Ok, who is this? Challenging lighting through the leaves is making colors not totally accurate, but seems to be an olive-ish back and a yellowish or orangish cap? And strong wing bars, but no strong eye/face markings. Dark tail, brown/chestnut on the flight feathers in the one backlit photo. Hopping around hiding behind leaves. Dozens of birds audible nearby, but nothing on Merlin with a timestamp close to the time of the pics seems a close match, and this bird was too busy grooming to sing.

My best guess is… immature or not-completely-in-breeding-plumage-yet chestnut sided warbler??? But as you can tell from me not even narrowing it down to Parulidae, I have no confidence on that, lol. (Curious to see what @psweet says, if he has time to help!)

I have a few more photos that I originally thought was this same little bird I was trying to track through the leaves, but that I now suspect is a different individual, will edit to link that once I get a minute to come back and post that observation (iNat between chores on day off…..) (Edit here: https://www.inaturalist.org/observations/218694467)