Spiders are invertebrates (no skeleton) and grow by shedding their skin or cuticle. Their bodies are in 2 parts; head and abdomen. All spiders make silk and all spiders bite in order to feed. Some spiders have venom that is dangerous to man and all spiders grow from an egg; some even carried on the back of the female. The female spider is normally larger than the male.
In domestic situations Redback spiders and whitetails are generally regarded as harmful and whilst Huntsman spiders are large, fast and look menacing, the fact is no spider tends to bite unless provoked. Huntsman spiders are actually very good predators of small insects in the home and clean up many unwanted biting insects.