The species inhabits
Fynbos, Indian Ocean Coastal Belt,
Savanna, and
Thicket biomes, as well as macadamia orchards. It occurs at altitudes ranging from 7 to 1,411 m above sea level.
Arachnura scorpionoides constructs a permanent orb-web with an open hub. The web is suspended at an angle and has a V-shaped section missing from the top. In autumn and winter, females produce a series of woolly brownish egg sacs, which they string together in a line from the centre of the web to fill the missing section. The spider positions itself at the bottom of the egg string. When disturbed, the female curls her tail up over her back like a scorpion. The front legs are stronger than the rest and are kept close to the body when the spider is alive. ==Description==