A pill bug is the common name for any of the species of woodlice, terrestrial [[crustacean]]s, in the family Armadillidiidae. Their notable feature is their ability to curl up into a ball as a defensive behavior.  Other common names for them are roly polies, slaters, and doodle bugs.

h4. See also

* [[Arachnid]]
* [[Bug]]
* "Wikipedia - Armadillidiidae":[https://en.wikipedia.org/wiki/Armadillidiidae]
ダンゴムシ ワラジムシ