Red-eyed vireo in the backyard!
Not that uncommon, but very nearly impossible to spot in this case–I got lucky with a glimpse through the branches of one of the live-oaks in the backyard. My brain sent two conflicting signals back–"hummingbird" and "warbler." The warbler for general size and shape, the hummingbird because it had a big honkin’ beak in proportion to its size, and was perched with its tail fanned when I caught the glimpse of it. Plus it had a buzzing call that was rather like the hummingbird.
ID seems straightforward–only other contender is Swainson’s warbler, which isn’t supposed to live in the canopy, and the buzzing shows up on the recording of the vireo’s song.
So, that’d be a lifer!