Birds Are Driving Me Crazy!

Please keep it down!

I have dealt with birds living in the space behind my kitchen fan before.  They probably discovered it and thought, wow, what a great place to live!  What a great place to raise some babies!  It all began with a bird who tweeted in the morning.  Sometimes, he woke me up.  I knew that the time adjustment for daylight savings time was approaching, and I hoped that it would improve the situation.  If he began tweeting at the usual time (for him) after the clocks had been moved forward an hour, he'd now start an hour later (as far as the clocks and I were concerned).  That's pretty much how it turned out.
However, today, things have exploded!  It seems like the loudest bird family in the world moved in to the space behind my kitchen fan.  They have been chirping and tweeting loudly all day long.  They've been making all sorts of weird noises. I kept telling myself, they have just as much right to be here as you do (even though they're not paying rent and I am).  I wanted to yell at them to shut up, but I resisted the urge.  I didn't want to scare the bird shit out of them.  I love animals.  How can a bird, who's chirping constantly, realize that he's being annoying?  I resisted the urge for so long.  I finally said, "that's it."  I marched over the the kitchen fan and said, toward it, "quiet please!"  I showed some restraint.  I didn't yell.  I just said it clearly and sternly.  I don't think it had much of an effect.  I tried it again.  I've said it a total of three times so far.
Currently, finally, it is silent behind my kitchen fan.  But how long will it last?  For how long must I endure this chirping Armageddon?