Про новозеландских пауков
New Zealand is home to about 2500 kinds of spiders, most of them harmless to people. Only some spiders are capable of biting humans. There are three species of spiders in New Zealand that should be avoided - the Katipo, the Redback and the White-tailed Spider.
The katipo (Latrodectus katipo) and the redback spider (Latrodectus hasselti) belong to belong to the same genus as the American black widow spider. These two are the only venomous spiders found in New Zealand. In both species it is the adult females that are capable of biting humans. Bites from both species are extremely rare and there is a safe and effective antivenom for both redback and katipo bites.
Про австралийских пауков
Of all the thousands of Australian spiders, arthropods and insects, only three have bites which alone are capable of causing death - the funnel-web spider (and related atrax species), the red back spider and the paralysis tick.
However there are many Australian spiders that are still poisonous, and can cause great pain and suffering if a person is bitten. If you visit Australia and unless you are an expert in spiders and Australian wildlife, then you should never approach a spider in Australia. Several poisonous spiders are very similar-looking to non-poisonous spiders, and can easily be confused.