honestly i read that a while ago from several places, while all hadronyche have the potential for medical significance im pretty sure the top 3 are
i remember another user from here also telling me Infensa is worse. Bear in mind that the males of A.Robustus are far deadlier, i think its more that Infensa females have more toxic venom than Robustus females.
As for location, all hadros are endemic to the east coast of Australia
@NYAN I personally think that Atrax robustus, due to the (definitely more venomous) male specimens wandering into homes, reached a (anyway well deserved) certain 'status' during decades, let alone 'international sensationalism', but as far as I know (and could be wrong, eh) venom potency talking only, H.formidabilis is way worst and, according to Wikipedia, this spider in particular H.infensa, has even a more potent venom in early Spring... amazing. What can I say, ah ah.
Unfortunately, my man, we will never have the chance to keep those, ahimè
@Chris LXXIX both my Robustus where bred, they are only juvies, but the Infensa was WC. The breeder sometimes recieves WC's though and he offered me a massive female Robustus that had just been sent to him but im happy with my 2 little ones