Orgy in the Pond!

 It's loud, loud enough to hear while pumping gas at the gas station across the street, but I wouldn't call it a din, because it's really a lovely, musical sound.  From close up, one can hear individual voices, but the effect is that of a chorus, as answering calls ring out, and distance and waveform interference and amplification change the pitch.  I figured that I'd use my phone camera to obtain an audio recording, though the light was insufficient to get more than a fuzzy impression of a couple of lights from the main road:

I didn't expect it so early in the year, because the spring peepers haven't started peeping, but the American toads (Anaxyrus americanus) having a major orgy in the pond at work.  These little critters are sex machines, they breed until May, in ponds, water-filled ditches, and vernal pools.  

I believe the low, growly sound is a pickerel frog (Lithobates palustris) that somehow got mixed in with the toads, perhaps looking for a prince.  Longtime readers will know that I have a fondness for amphibians, and working at night in a place with extensive grounds with mixed habitats (pond, bit of wetlands, bit of woods, bit of grassland), I encounter them on a regular basis.  I am overjoyed that I have a loud musical background to my worknights, and that this music signals the imminent arrival of another generation of little batrachian buddies.