Black House Spiders

Black house spiders (Badumna insignis) are found in Australia. The thorax of the black house spider is lustrous black, while the legs range from black to dark brown. The abdomen is coal gray in color and their backs exhibit a white patterning. Females of this species are larger than the males.

Frequently mistaken for funnel webs, black house spiders are known to weave webs that are funnel-shaped with a lacy flat pad leading to the tunnel’s opening. The web of the black house spider may eventually appear gray and tangled as a result of constant repair.

Black house spiders can be found in cracks in walls, rusting iron and the angles of windows, as well as many other sheltered crevices within a structure. They may also inhabit the bark of unhealthy trees. The sap from these injured trees attracts prey for the black house spider. They prey upon various flies, butterflies, beetles and bees.

Although their bite is not lethal, humans may experience negative side effects from a black house spider bite. Vomiting, muscular pain, weakness, nausea, sweating and shortness of breath may occur if a bite is severe. However, black house spiders rarely attack humans; they bite only when threatened.