[soundtrack]I could hear the red-winged blackbirds from across the meadow. Hundreds of them. Through the binoculars, a constant stream of birds continuously flowing. I made my way through the freshly mowed field. They saw me. Instant silence, then a loud whoosh as hundreds of birds simultaneously winged across the river to a new roost. The cacophony began again, distant now.
[soundtrack]The ruby-crowned kinglet was singing as I passed, then chattering a lot, then singing some more. It sings while it works, hopping from branch to branch, hovering a little to snag a bug from a berry.
[soundtrack]A white-throated sparrow is whisper singing. Thin wobbly nursery rhyme whistles from the shadows. UPDATE: Here are four more White-throat examples. The first is less whispered than less-than-fully articulated and got a response. The rest (2, 3, 4) are softer and odder.