Eresus kollari, the ladybird spider, is a spider species in the family Eresidae. It was first described by Walckenaer in 1802, though it was misidentified. It was later correctly described by Rossi in 1846. It is one of the three species into which Eresus cinnaberinus or Eresus niger has been divided. It is thought to be endangered.
Their body as most velvet spiders, resemble somewhat those in the jumping spider family. The males have a contrasting color, having a black and red coloration, while the females are completely black. The opisthosoma looks velvety, as their common name would imply.
They inhabit warm areas, in areas with loose and low vegetation. This spider most often happens in grasslands. Though it has also been found in dry and bright forests. It is found all throughout Europe, except up in the north.
