If winter is coming where you live, and windows are shut, at least in the morning, the problem will go away. Soundproofing/ insulating the wall nearest the neighbor's house may help too.
Have you talked to them? maybe they don't mind at all.
I've never tried it, but would playing 'elevator...
I don't have anything to add, except some birds just talk more than others. You might want to rehome your loudmouthed individuals, and try for some quieter girls.
I think it's kinda cute!
Mary