Why weeps a little skylark?

She weeps because:

She lost her best friend,
Searched overall she could,
With special songs,
As only skylark sings.

Nobody heard the melody,
That little bird was singing.
Without help from the other birds,
Sne couldn't say the truth.

She tought: I will compose,
The nicest song in double voice,
For little souls that look from sky,
For theirs hidden and lost singer.