- Adult pillbugs can grow up to 3/8 in.
- When disturbed they are capable or rolling up into a tight ball, allowing their shell-like exterior to protect them.
- They are almost indistinguishable to the naked eye from their close relative, the pill millipede.
- The differentiating factor is the number of legs.
- Pillpugs only have one pair of legs per body segment.
- Pillbugs have a total off 11 body segments.