There is a time and a place . . .

[pomtzu]

At least you know where he/she is, and you could run him/her off if you were so inclined - unlike crickets who are never where their song indicates that they are. Many a night I have tried to hunt one down in the house to silence it's serenade, but to no avail. My son's cats eventually locate them and feast upon the noisy little pests, but they leave the not so meaty legs all over the kitchen floor!

ETA: I wonder if your little chatterbox was once someone's "pet", since he knows some people related sounds??