Blue-winged Warbler
Admittedly you probably can't see blue wings here, but this is apparently a Blue-winged Warbler , or at least that's what the iNaturalist folks tell me. Unfortunately this bird was a little too far away for me to point out most of the field marks: You can see that this bird is mostly yellow outside the wings, and you can probably tell that there's a black line going through the eyes. After that, you may need to use a little imagination. The wings are usually described as either "steel blue" or "blue gray"; I'm not sure you can conclusively call these wings anything more than dark, possibly earth-toned. They're also supposed to have 2 wingbars, which are from 2 rows of feathers (coverts) on the wings. I think I can see 1 wingbar in this picture. The other wingbar is presumably there but just isn't showing up in this picture. Blue-winged Warblers are apparently close relatives of the Golden-winged Warblers , and the 2 species hybridize so ofte...