This hard-to-photograph bird (Cistothorus palustris) was sent by Stephen Barnard (of course), who added these notes from Idaho:
These are secretive and elusive birds. I had to show this photo to my Idaho birder friends to ID it. Then I listened to its songs on my iPad and realized that I hear it a lot in the spring, and it must be common, but I never see it. It was one of those aha! moments.
It was eating midges from the water surface.
Here is its range map from the Cornell Laboratory of Ornithology, where it is described like this: “A common and noisy inhabitant of cattail marshes, the Marsh Wren sings all day and throughout the night.”
Its diet: mostly insects.
The CLO also recordings of its lovely twittering song.