Egg in my Office; Office Egg

Very busy, not paying much attention to my surroundings as the office fills up with reams and reams of paper, shifting in the Spring breeze. What everyone, even me, now refers to as The Document edges closer and closer to completion. One morning I have time enough to notice a scrawny pile of twigs poking out from underneath a chair in the corner. Pick them up, look at the ceiling, wrinkle my brow, put them in the bin, forget about them. On another, as I return from the latest meeting, there's a kerfuffle of wings at the open window. Then at last, it's over. Success. Relief. Beer. The next day, tidying the office, I notice the twigs have returned and get down on my hands and knees to look under the chair. Its only then I realize why the same mute pigeon has been visiting my sill almost every day for the last two weeks.