I photographed a Blackburnian Warbler today in Hollywood. I was walking from my brother's house to my parent's new place in Hollywood. It was at intersection of S 20 Avenue and Plunkett Street in a mixed flock.
As usual, the neighborhoods with oaks, Black Olive and figs harbor many a mixed flock of passerines; I ran into several other warbler species, including two Cape Mays.
See the photo of the Blackburnian in the eBird checklist below.