How casual australians act around local wildlife was the most surprising thing for me (german) when I went there.
Lots of little Jellyfish in the water close to Sydney harbor? Guy walks into the water, picks one up with both hands, walks up to us like "guys I haven't seen those before, anyone know what kind that is?".
Cliff jumping with aussies, see water below us foam up a bit. "Looks like sharks. Ah it's probably just small ones, they won't do shit". (Fun fact: that was the exact cliff jumping location of this (faked) video)
Big ass spider inside a construction site I was working on. Like, big enough to drop a magical sword if you kill it. Asked my boss about it. "Nah leave her alone, it's the house spider. She's not dangerous!". When I asked whether "not dangerous" meant those kinds of spiders aren't venomous he answered "Nah we'd still have to drive you to the emergency room. But like, not as fast as we'd have to with other spiders". Ok thanks boss.
Stuff like that really makes me wonder how many of the people I've met there are still alive today.
Taedalus