Roly Polies

Often mistaken for insects, armadillidiidae is a family of woodlice, a terrestrial crustacean group in the order Isopoda. Unlike members of other woodlouse families, members of this family can roll into a ball, an ability they share with the outwardly similar but unrelated pill millipedes and other animals.

It is this ability which gives woodlice in this family their common name of pill bugs or roly polies. Because of their unusual yet non-threatening appearance, certain types of armadillidiids are kept as pets in areas such as the American South, typically among children. Owners of pet tarantulas sometimes keep pill bugs as cage cleaners in the same habitat. The pill bugs eat feces, mold, and leftovers.

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