The females are much larger than males, for example in N. malabariensis 20 mm versus 4 mm. Adult males do not build their own webs, but live with females, with sometimes several males found in the web of an adult or immature female.
In the species N. malabariensis, females are notably larger than males, measuring 20 millimeters versus 4 millimeters in size.  Adult males do not build their own webs and instead live alongside females, with sometimes multiple males sharing the web of a female.