Bug cemetery: a case study of terrestrial isopod distribution on a brick wall in the Czech Republic.

Although terrestrial isopods (Oniscidea) are primarily soil- and surface-dwelling invertebrates, they can also be found on tree trunks and walls. This study evaluated distribution patterns of terrestrial isopods on a brick wall during the first hours of night in autumn. Four species of terrestrial isopods were recorded with Armadillidiumversicolor being the dominant one. Terrestrial isopods were distributed from ground level up to a height of 2 m, but preferred a 70-80 cm height band. The highest number of active individuals was observed 3 h after astronomical dusk. Potential predators of terrestrial isopods were abundant during the same time and at the same height.