Queen of Kings

The covering to the vent which is connected to the fan which, when running, expels stinky air from our washroom came off, and a family of kingbirds decided to nest directly behind the flapper valve. I like kingbirds. I do. And it was for their sake and my own that I decided they must go. Their sake - I doubt kingbird chicks would enjoy getting blasted with unpleasant human odours a few times a day. My sake - my wife was beginning to be creeped out by the occasional flapping sound directly above the toilet.
Outside, I observed two kingbirds watching me in some annoyance as I poked about the home they had come to regard as rightfully theirs. Rather than go and buy a covering for their front door, I instructed my 2-year-old to guard the hole against their entry while I went in search of a suitable plug. Either she failed miserably, or there was a threesome in this family.
I brought the towel back, and, hoping that there was no bird in the nest, plugged the hole.
Today, Andrea brought my attention to the reoccurrance of the mysterious flapping noise from the bathroom fan.
I unplugged the hole and looked inside, but the curvature of the duct hid the bird from view. So I went inside, removed the fan, and sure enough, there were a bunch of feathers sticking out of the flapper. Moving the flapper forced the bird a little ways up the duct, and going outside once more, I saw her perching fearfully about a foot inside the hole.
I pleaded with her to remove herself. I reasoned with her - this is my house, bird. Not yours. I commanded her to fly away. But, having spent a day trapped in a fan vent, she was somewhat reluctant to emerge from said vent with me standing there, watching her. My neighbor came over, and we discussed the problem. He said she'd probably laid eggs already and was guarding them.
I went inside and banged on my bathroom ceiling, and she finally flew out. I plugged the hole again, and went about removing the nest from behind the flapper with a pair of needle-nose pliers, then my hand, then Andrea's hand, and we think we removed all the grass, leaves, feathers, and bird smell from the vent. Fortunately there were no eggs; although I was half-hoping to find some - I've always thought it would be cool to rescue some eggs and hatch them.