UFO Sighting in San Francisco, California on 2017-01-29 16:45:00 – Strange object over golden gate bridge

I was in san francisco for a concert, and snapped a few pictures of the golden gate bridge while i was there. upon reviewing the pictures, i noticed something that was unlike the other things in the sky (birds). i didn't notice it at the time, just afterwards while looking at the photos. thought it was interesting, so i'm submitting it to you for review. i've included original photos, and photos where i've circled the area to zoom into.