During a performance, it is typical for the song to increase in speed with each additional verse, almost as a challenge to determine who can sing the lyrics the fastest without getting mixed up. Some performances have one singer leading the song, singing the "Now on that..." lines solo. The whole group then joins in for the cumulative list and chorus. In some live performances, the audience sings along for as long as they can keep up, with most only singing the chorus by the end of the song. Many variations exist where additional verses are added or exchanged to suit the locale where the song is performed. North American folk group
The Idlers customarily sing about a bird inside an egg inside another bird that is in the nest, while others have a bird in the egg in the nest. Additionally, the group added a rash on the flea as a final verse. County Durham folk singer
Ed Pickford added further verses going as far as an amoeba, in the process creating a popular drinking game as players try to keep up.
Seamus Kennedy added even further by following an amoeba with a paramecium, followed by a virus, and finally a subatomic particle. Irish Singer
Philip Noone took the song in a different direction completely by giving the chick a cigarette and ending with the smoke coming from the cigarette. The song can be sung as an echo, where each line is sung by a lead and then repeated by others. One version of the final line+refrain is: Each phrase is sung to the same two-note melody. == Notable recordings ==