As you pound along the track

With eye well out and ears pinned back

 You may have seen those queer square turds

And thought, though not expressed in words

The pain of such defecation

Baffles the imagination

But isn't done to entertain us

The wombat has an oblong anus

So if at night you hear pained cries

Outside your tent, feel no surprise

With eyes shut tight, teeth clenched with pain

A wombats gone and crapped again!