The Sydney funnel-web spider is a species of venomous mygalomorph spider native to eastern Australia, usually found within a 100 km radius of Sydney. It is a member of a group of spiders known as Australian funnel-web spiders. Its bite is capable of causing serious illness or death in humans if left untreated.
The Sydney funnel-web has a body length ranging from 1 to 5 cm. Both sexes are glossy and darkly coloured, ranging from blue-black, to black, to shades of brown or dark-plum coloured.