Aha - More noble beasts

"I'm dirty and lousy and full of fleas
Said Barnable Bill the Sailor"

(louses and fleas count as two)

"In the progress of civilization
From anthropoind apes down to man
The palm is awarded the Navy
For frigging whatever it can.

Exhaustive experimentation
By Darwin and Huxley and Hall
Has proved that the ass of the hedgehog
Can hardly be buggered at all

We therefore believe our conclusion
Is incontrovertibly shown:
Comparative safety on shipboard
Is enjoyed by the hedgehog alone"

Heather Wood's Hedgehog Song goes on to add verses dedicated to other potential animal "targets" to include the:

bear, horse, donkey, ox, fox, shrew, asp, wasp, elephant, bee, termite, beetle, ladyird, cat, rabbit, ermine, rat, mouse, roach, dog, giraffe, yeti, fly, cow, boar, piglet, stoat, sow, ram, ewe, tiger, seal, eel, crab, bat, snake, quetzal, billy, nanny, kid, slug, snail

That's 42 animals not counting the anthropoidal ape and the hedgehod himself.

Interestingly enough Heather doesn't connect her piece back to the Naval reference.