Insect and Spider Identification: CLOSED: Can anyone tell me what this is?, 1 by MargaretK

MargaretK wrote:
We sometimes see these insects in the yard in suburban Perth, Western Australia. This was quite a small one, compared to some we've seen. It was about 6cm (two and a quarter inches) long, had very long antennae and boy, did it have attitude! It was very active and continuously turned to face me, putting its front legs up and shaking them, as if challenging me to a fight. I'm not scared of insects but there's no way I'd think about picking this little fellow up.