Lol!
Many many years ago back when I lived in Brooklyn Ny,our apartment building had them.
You look out the back windows and that's all you saw were lines all over the place!
And you can tell when somebody was doing laundry by the indistinctive squeak it had when they were putting their clothes out.
I forget what bird it is but it makes the same exact sound!I allways called it the squeaky clothsline bird since I was a kid..