Part of the disconnect is that the bird's reaction comes from the part in the story where we think he's just starting, with his three pieces of grass, so he *could* have just noticed the dryer. :)

On the other hand, maybe he was just a bird curmudgeon. Like a tenant below, pounding on the ceiling when the music gets too loud and cursing out "those damn kids" - every time the dryer goes on he loses his temper about it.