A wonderous bird is the pelican
His beak holds more than his belly can

and

The turtle lives twixt plated decks,
which almost entirely hide its sex
I think it clever of the turtle
In such a fix to be so fertile.

Both by Ogden Nash

Limerick
There was an old man from Nantucket
Who kept all his dough in a bucket.
His daughter, named Nan,
ran away with a man.
And as for his bucket
Nan tucket!