NPPF Canto Two--reversals and substitutions

[Paul Mackin]

I don't know why it might be significant but the retellings of both the
Ant and the Grasshopper story and the Ugly Duckling story not only
reverse the story outcomes  but involve slightly different animals--a
cicada takes the place of the grasshopper and a wood duck (a beautiful
creature) takes the place of a swan. 

It must mean something.

p.