It is one of the best omens possible to hear a bird singing happily ; it is Nature in her kindest mood. But if the songster is shut up in a cage, then your own greed will cause the failure of your plans.
Ten Thousand Dream Interpretation
To hear them singing as they fly, you will be very happy in a new change of abode, and business will flourish.
To see them fall to the earth and singing as they fall, despairing gloom will overtake you in pleasure’s bewildering delights.
A wounded or dead lark, portends sadness or death.
To kill a lark, portends injury to innocence through wantonness.
If they fly around and light on you, Fortune will turn her promising countenance towards you.
To catch them in traps, you will win honor and love easily.
To see them eating, denotes a plentiful harvest.... Ten Thousand Dream Interpretation