The wheel spider or golden wheel spider (Carparachne aureoflava), is a huntsman spider native to the Namib Desert of Southern Africa. This spider should not be confused with Leucorchestris arenicola, a spider sharing the same common name as well as the same locale. The spider escapes parasitic pompilid wasps by flipping onto its side and cartwheeling down sand dunes at speeds of up to 44 turns per second.

Wheel spiders are up to 20 mm in size, with males and females the same size. The wheel spider is a nocturnal, free-ranging hunter, coming out at night to prey on insects and other small invertebrates. Its bite is mildly venomous, but the spider is not known to be harmful to humans.

A Wheel Spider burrow.
A Wheel Spider burrow.
The wheel spider does not produce a web. Its principal line of defence against predation is to bury itself in a silk-lined burrow extending 40–50 cm deep. During the process of digging its burrow, the spider can shift up to 10 litres of sand, 80,000 times its body weight. It is during the initial stages of building a burrow that the spider is vulnerable to pompilid wasps, which will sting and paralyze the spider before planting eggs in its body. If the spider is unable to fight off a wasp, and if it is on a sloped dune, it will use its rolling speed of 1 metre per second to escape.


source - Wikipedia
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