Blackbird nursery rhyme?

Question:

Blackbird nursery rhyme?

does anyone know the words to a nursery rhyme about a blackbird that starts with something like 'april i open my bill...'

Additional Details

4 months ago
fabulous thank you guys for the cuckoo rhyme - exactly what i was after
cece youre a complete f*c*wit - writing gibberish for the sake of a few points is annoying and stupid

Best Answer - Chosen by Asker:

Cuckoo, cuckoo, what do you do?
In April I open my bill;
In May I sing all day;
In June I change my tune;
In July away I fly;
In August away I must.

any help?