The lark sings as it flies, unlike most other birds, who only sing when perched. Its song symbolizes hope and good fortune.
Shakespeare wrote about the lark at the break of day in Sonnet 29
When in disgrace with fortune and men’s eyes
I all alone beweep my outcast state,
And trouble deaf heaven with my bootless cries,
And look upon myself, and curse my fate,
Wishing me like to one more rich in hope,
Featur’d like him, like him with friends possess’d,
Desiring this man’s art, and that man’s scope,
With what I most enjoy contented least;
Yet in these thoughts myself almost despising,
Haply I think on thee,—and then my state,
Like to the lark at break of day arising
From sullen earth, sings hymns at heaven’s gate;
For thy sweet love remember’d such wealth brings
That then I scorn to change my state with kings.
I all alone beweep my outcast state,
And trouble deaf heaven with my bootless cries,
And look upon myself, and curse my fate,
Wishing me like to one more rich in hope,
Featur’d like him, like him with friends possess’d,
Desiring this man’s art, and that man’s scope,
With what I most enjoy contented least;
Yet in these thoughts myself almost despising,
Haply I think on thee,—and then my state,
Like to the lark at break of day arising
From sullen earth, sings hymns at heaven’s gate;
For thy sweet love remember’d such wealth brings
That then I scorn to change my state with kings.
This sonnet has been set to music by Rufus Wainwright. His version is very refreshing and powerful.