Woodlice are small, terrestrial crustaceans belonging to the order Isopoda. They are commonly found in damp environments, such as under rocks, logs, or leaf litter. Woodlice have a segmented body covered with a hard exoskeleton, and they typically measure about 1 to 2 centimeters in length. Unlike insects, they have seven pairs of legs and breathe through gills, which is why they need moist habitats. These creatures play an important role in the ecosystem by breaking down decaying plant material, contributing to soil health. Woodlice are often mistaken for insects, but they are more closely related to crabs and shrimp. They are harmless to humans and can be beneficial for gardens.