Envies

Caged Bird, she can't fly,
Confined in a cage too small to try,
Wings don't work, can't fathom why,
Caged bird, she can't fly.

Bird envies birds outside,
Bird wonders if she's really alive,
Bird feels unhappy inside,
Bird envies birds outside.

Can't remember what she is,
What is this...this...what?  This...
Bird?  Flighted animal whiz?
Can't remember what she is.