This is so great to read - I love how oral tradition has changed and modified it - the song has different dialects :)

In upstate NY, I learned:

A quack a dilly oma
quack quack quack
Hey chico, chico,
Chico, chico, Chack
Follow, follow, follow, follow, follow
Follow 1-2-3-4

For ours 4 was the "get out" number with the same right hand to left hand clapping. Once down to 2 players though, the after singing the number "4", the chanting went "i declare a thumb war - kiss. bow. begin" and the thumb war determined the ultimate winner.

As a music teacher now in CT, I pass on my version to my students - though I had no idea until now that it existed in so many different variations. Can't even remember where I learned it but I've been teaching it since working at camps in high school.