Pill bugs, a.k.a. sowbugs, are a common type of woodlice related to lobsters,
crabs and shrimp.
Pill bugs are the only crustaceans which have thrived on land.
Their name comes from their ability to roll into a ball to defend themselves.
An Unusual Defensive Strategy
Their ability to roll into a ball is known as
What causes pill bugs to roll into a ball?
Vibrations and pressure often trigger conglobation, which is a defense
not only to predation but also against respiratory and water loss.
Cage cleaners? Yep!
Insect and spider aficionados sometimes employ pill bugs to clean the cages
of those with whom they share a habitat. Random, but true!