Last year, as a birthday present, I was fortunate enough to receive a copy of Irish Songs and Ballads by Alfred P. Graves printed in 1880.
Graves enlarged on the two verses that Bunting collected to produce this version of the song.........

MY BONNY CUCKOO

My bonny cuckoo come whisper true
Around the world I'd rove with you
I'd rove with you until next Spring
And still my cuckoo would sweetly sing
Cuckoo, cuckoo until next Spring
Cuckoo, cuckoo until next Spring

The ash and the hazel shall mourning say,
My bonny cuckoo, don't fly away;
The winter wind is rude and keen
Oh, cuckoo, stay and keep us green
Cuckoo, cuckoo, Oh stay! Oh stay!
And make the season forever May

The thrush and the robin shall sadly cry
Oh bonny cuckoo, Oh do not fly
For when you spread your speckled wing
We have no longer heart to sing
Cuckoo, cuckoo still lead our tune
And make the season forever June

The lads and the lasses together stand
And call the cuckoo from off the strand
"How can you leave us bird of love
With the green below and the blue above
Oh no! Oh no! you shall not go
With the blue above and the green below"