A few years ago, I was at my parents’ house in Alabama and decided to try recording the hummingbirds that frequented their patio feeder. I clipped a pair of binaural electret microphones to the bottom of the plastic feeder, pressed the “Record” button on my minidisc recorder, and went in the house for about a half hour.
When I listened to the recordings later, I was astounded. The rapid beating of the hummingbirds’ wings sounded like quick bursts of airplane propeller noise.
Note that in the last sample, the recording ends with the sounds of two male hummingbirds fighting. They’re pretty but violent little buggers.Recording Notes: Minidisc recorder, clip-on binaural electret mics