Zodarion rubidum is a spider species of the Zodariidae family. Like most Zodariidae, Z. rubidum is an ant-eating spider. It resembles ants structurally and behaviorally. Z. rubidum specifically mimics red ants, such as Myrmica sabuleti. It often feeds on Tetramorium caespitum or Lasius platythorax. Z. rubidum is up to 5mm in size. Like many other zodariid spiders, it moves across open ground in the evening and at night.