Paul Laurence Dunbar - Preparation

THE little bird sits in the nest and sings
A shy, soft song to the morning light;
And it flutters a little and prunes its wings.
The song is halting and poor and brief,
And the fluttering wings scarce stir a leaf;
But the note is a prelude to sweeter things,
And the busy bill and the flutter slight
Are proving the wings for a bolder flight!

Paul Laurence Dunbar

http://www.poemhunter.com/poem/preparation-3/