About 10 days ago, I went hiking at a local park.
Strolling down a hillside, I heard a rhythmic sound that got louder and louder as I approached a pond.
It was frogs singing -- what a joyous cacophony!
PS - I tried creeping closer to get a glimpse of at least one of the performers, but once I crossed some invisible threshold, the frogs' song gradually faded away. Chastened, I backed off and the frogs gradually resumed their singing.