In the waning evening light, I stood in the barnyard
holding the hose to fill the water trough,
gazing across a sunset-lit field of grass and weeds,
puzzling over an intermittent flash and glimmer thirty yards away.
Trough filled, I set out to find what glinted and blinked in the breeze,
assuming an errant piece of foil or lost piece of jewelry to be reclaimed,
somehow fallen mysteriously from the sky into the middle of a horse pasture.
As I moved closer, my body blocked the sun’s rays
so the glistening ceased. I moved aside,
hoping to allow the fading light
to re-ignite the spark that drew me there.
Doused by the advancing shadow of sunset,
it vanished as I neared the spot.
Looking closely, I found only a broad blade of grass
shimmering with a silvery trail left behind by a slug tail.
Mere mucus slime scintillating in the setting sun!
A complex mix of proteoglycans, glycosaminoglycans,
glycoprotein enzymes, hyaluronic acid, antimicrobial peptides,
and metal ions of zinc, iron, copper and manganese.
Precious trace metals flashing in the grass, masquerading as jewels.
What a fool to think only something man-made could lure me there.
Instead, this miracle of mucus trailing from a lowly slug proved
a far greater treasure is always hiding in the grass,
if I only bother to look.
Girls are like slugs—they probably serve some purpose, but it’s hard to imagine what.
― Bill Watterson, in Calvin and Hobbes
From David Attenborough’s Life on our Planet
(a truly remarkable video of how slug mucus becomes integral in their reproductive cycle)
A new book from Barnstorming is available to order here: