Lyric discussion by PlutoniumBoss 

Cover art for Birds Fly lyrics by They Might Be Giants

As for the line "birds fly, into my windshield", it is a good example of the kind of bait-and-switch game TMBG likes to play with their imagery. It's characterized by a positive image (Birds fly), sometimes followed by a pause but then followed by a twist (...into my windshield). See the song "Twisting In The Wind" for another good example of this.