Possible Plumbeous Vireo – edge of Piway Community Park
Just photographed a Vireo with very contrasty, well defined spectacles, and as far as I can tell from looking at photos on the camera, back is all gray. Shows no yellow or green tones on flank that I can see. I have limited experience with Plumbeous, but thought I would post in case that's what it is. It was in two different Sycamore trees that are next to each other just before path that runs along Poway Creek, along sidewalk between the Community Park, and what Google shows as a boys and girls club.
Source: SanDiegoRegionBirding Latest Reports