In a lighter vein: I finally found out what the frogs making that intriguing noise at night are!
Green Frogs, . (I know, creative name.) The male’s call is described as “the pluck of a loose banjo string.”
A banjo string is certainly a lot less embarrassing to ask someone about than having to say “Hey, do you know what those frogs that go “bonk” are?”
I was not able, alas, to find recordings online to link to, but if you know of one, please share! Duh! It was right in front of me–thanks to DavidP for finding that.
A green frog pales in comparison, though, to the psychedelic purple frog from Surinam recently discovered.