The family Amaurobiidae has only one genus, consisting of 5 species.
Most members hide in holes in trees or man made constructions.
Their size is between 7 and 12 mm. The web usually extends around the entrance of the hole. These spiders can also be spotted inside our houses during the night. The Amaurobiidae are also called night spiders because they are active at night. All five species are quite large with firm legs and may lives for several years.