I think this is by Spike Milligan but I'm not sure. I just remember my dear departed Dad saying it to me when I was little. So in his memory here it is again.

Spring has sprung, the grass is 'ris.

I wonder where the birdies is?

Some say the birdies on the wing.

'Tis the silliest thing I ever heard.

For I know the wing is on the bird!

Have a great day all.