|Charles River at Charles River Peninsula just after dawn|
I'd stopped to capture some phoebe song (amidst loud ringing song sparrow and robin choruses) and there in the brush, kicking up leaf cover, was a lone fox sparrow singing while it foraged. Not singing loudly or consistently enough for a good solo recording, but a nice addition to the overall songscape.
Further down the path I found what I was hoping for. A male perched in a low tree singing repeat choruses. I initially mistook it for a house finch (I'm used to more "slide whistle" in fox sparrow songs) but after a few concentrated listens its identity was clear. It sang until it chased off a competitor. Of particular interest, two notes at the beginning of each phrase that sound suspiciously tufted titmouse-like.