Puzzling Warbler in San Carlos

8:39 pm

Very puzzling warbler visited our backyard bird bath in San Carlos this evening 10/21.

Bright olive upper side, bright yellow below. Yellow on face and head, except had black blotches on crown of head, around neck, and on throat, all spotted with yellow. Yellow cheeks around black eyes. Did not vocalize. Very poor photo on eBird list: https://ebird.org/checklist/S280724700