While frequently attributed to Ogden Nash or ee Cummings the author of this amusing nonsense – known as “Spring In The Bronx” – is Anonymous.
Spring is sprung, the grass is ris.
I wonders where the birdies is.
They say the birds is on the wing.
Ain’t that absurd?
I always thought the wing was on the bird.
In Arnold Silcock’s Verse and Worse, it is attributed to ANON [New York], and goes thus:
The Budding Bronx
Der spring is sprung
Der grass is riz
I wonder where dem boidies is?
Der little boids is on der wing,
Ain’t dat absoid?
Der little wings is on de bond!
Some people mention Spike Milligan as the possible author, but it seems far more likely that he simply heard it, liked it, and repeated it.