Nature Gardens at NHM: LA's Urban Nature

Showing posts with label : woodlice

April 22, 2011

North Campus Pill Bugs

Finding Pill Bugs

I always knew we'd find pill bugs in the North Campus, but until recently I didn't know what species, or that they'd have such an interesting story.

In the North Campus there are two species of terrestrial isopods, what we at the Museum call pill bugs and their relatives. The Common Pill Bug (aka roly poly), Armadillidium vulgare, rolls up into a tight little ball when disturbed. We also find a closely related species, the Common Rough Woodlouse, Porcellio scaber, a more agile creature. In North America most of the people I've talked to refer to both as pill bugs, whereas in England, where I grew up, we called them all woodlice! Regardless of what one calls them, they both share a similar story of how they come to live in North America.

Common Pill...