Lomechusa
A beetle, lives in ant heaps; produce a glandular secretion that is pleasant for ants, so they put up with L.; beg for food, imitating ants behaviour (by hitting whiskers against the ant’s head); feeds by ants and lays eggs resembling ants’ eggs. L. larvae eat the ants’ eggs and larvae and then learn to beg for food as well, so it allowing L. to continue breeding.
Location: the glass wall in the entrance hall.