Unlike other terrestrial arthropods such as insects and spiders, pill bugs do not have a waxy cuticle that would reduce evaporation from their bodies.

Individual pill bugs typically live for two or three years, and females brood eggs once or twice each summer.

In larger species and individuals, up to over an hundred eggs are brooded at a time in the marsupium, a pocket on the ventral side of the female pill bug.

The colouration especially of young A. klugii resembles the red hourglass marking of the Mediterranean black widow Latrodectus tredecimguttatus.

This is probably a kind of mimicry, to ward off predators that mistake the harmless animal for a venomous spider.