Huntsmen do not build webs but forage for food - mostly insects and other invertebrates. They live in the crevices in bark. They will frequently wander into homes and cars, and are able to run extremely fast. They travel on walls and even on ceilings, having quite a good ability to adhere to smooth surfaces. They also tend to exhibit a "cling" reflex if you attempt to pick them up, making them difficult to shake off and much more likely to bite. The females are fierce defenders of their young. They will generally make a threat display, but if the warning is ignored they may attack and bite even humans.
The common Huntsman (Isopeda; Isopedella) is grey in colour, up to about 6cm across, with a soft furry body. It is frequently found in sheds, garages and other infrequently disturbed places. The banded Huntsman (Holconia) is larger, grey to brown with striped bands on its legs. The Badge Huntsman (Neosparassus) is larger still, brown and hairy. Its bite will inflict the worst injury, as well as local swelling and pain may cause nausea, headache, vomiting and heart palpitations. The Tropical or Brown Huntsman (Heteropoda) is also large and hairy, with mottled brown, white and black markings. They are not found in south eastern Australia or Tasmania.