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30 Pill Bug Facts About This Common Woodlouse

Author

Isabella Floyd

Published Apr 02, 2026

pill bug facts, Close view of a upside down pill bug on the nature

Pill bugs are also known as rollie-pollies, but that is not their real name. The bionomical name for the pill bug is Armadillidium vulgare. Here’s an interesting tidbit we drew out of a bag of pill bug facts, they are not insects! Don’t be fooled by their antennae and shell, though they are frequently connected with insects and referred to as “bugs,” pill bugs are actually members of the Crustacea subphylum. This means they are more closely related to shrimp and crayfish than to any insect.

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