"The Siphonaptera" is a nursery rhyme, sometimes referred to as Fleas.
Sometimes a second verse appears, with lines such as
The rhyme is seemingly related to lines by Jonathan Swift from his long satirical poem "On Poetry: a Rhapsody" (1733):
Lewis F. Richardson adapted the poem to meteorology, specifically discussing fractal wind patterns:
Gene V. Glass quoted an anonymous adaptation of the poem to educational measurement:
References
The Siphonaptera Wikipedia(Text) CC BY-SA