Is from "Hounds of Love", my favourite of her albums. I have it packed away right now so can't check the lyrics for you. You may be right though...I can hear it in my head. She has a new cd out "Aerial" which takes some inspiration from birds in flight. I've ordered it but not heard it yet.
I love love love Kate Bush. I don't try to figure her out. Like all art, she's making connections and leaving a lot (the rest) open.