Brooklyn Wildlife

We have quite a bit of wildlife action going on in our tiny backyard. To our big delight, a pair of turtledoves has made a nest in our grape arbor. Its not much of a structure, just some very loose sticks and grasses on top of each other. It hardly looks as though it could support the eggs, much less the parents as they take turns sitting on them. It is pretty neat having this little family just a few feet from our house. The only disadvantage is that I feel guilty going outside for every time I do so, the birds flutter away in panic
In addition to the love birds, we have a very vocal mockingbird who took up residence in our teeny
backyard oasis. As gentle as the doves are, the mockingbird is aggressive and loud. Which brings me to last night. Did anyone out there know that mockingbirds sing at night too? I have been woken up a few nights in a row now with the insistent chant of this feathered disturbance. At first, I thought that it must have been shortly before dawn. I was too lazy to fumble around in the dark to find my glasses, without which, I am pretty much blind and cannot see the alarm clock to check the hour. But last night, I could have sworn I had just fallen asleep, when the little monster started chirping. This time, I checked. It was precisely 1:20 AM. Is that normal? He sang all night, I kid you not. My better half woke up at 3 AM and complained.
Now don't get me wrong. I love the singing of birds. I would prefer to listen to it during the early morn and during the day. But at 1:20? What is wrong with this thing. Has the nightlife on Smith Street inspired this little fellow?
Does anyone out there know what is going on with Brooklyn mockingbirds?