Hawkwind - Wings Lyrics

I could see their dying note
In the sky that is so old
I remember where they once flew
Where they sang to the morning dew
Now their wings are soaked in oil
Caged wings that can't unfurl
No longer do we hear them sing
No longer do we hear the fluttering
Of wings
Underneath the iron bird
Their song cannot be heard
Above the human sound
Above the poisoned ground