06/06/2026
The Common Pillbug (Armadillidium vulgare) is one of the most abundant creatures in my yard. While they’re invertebrates like insects, they aren’t insects at all—they’re actually crustaceans, making them more closely related to crabs and lobsters! Unlike insects, which have six legs, pillbugs have ten. Often called “roly-polies” for their ability to roll into a protective ball, these fascinating animals are now widespread around the world, though they originally came from Europe. They thrive in damp environments and can often be found beneath logs, stones, leaf litter, and, in this case, under my pool filter mat. Pillbugs play an important role in the ecosystem by helping break down decaying organic matter, including wood, fungi, plants, and fallen fruit. These tiny recyclers are nature’s cleanup crew!