Bug

This morning I sat on our front step enjoying a cup of tea and the unexpected sunshine. The forecast was for rain, and it is raining now, but for about half an hour this morning it was lovely.

While I was sitting there, half asleep still, I saw a bug moving across the ground in front of me. It was red and black, and I leaped up. A couple of years ago we had an invasion of Australian redbacked spiders in the area, and were warned about it. I had never seen one, but maybe this was it! I hovered for moment, knowing I should step on it. But instead, I dashed inside to get my camera.

By the time I came back I was more awake. In fact I was awake enough to see that although the bug was red and black, it in no way even remotely resembled a spider. I should not attempt bug identification when I am half asleep.

I took a photo anyway, confident that The Man would be able to identify it for me.

He couldn't. He thought at first it was a stink bug, but it is the wrong shape entirely. Trying to Google it did not help. It also doesn't help that these are not great pictures. The size of the bug is a bit over one centimeter, I guess. (That stone is a little less than 3 cm top to bottom, which gives some idea of scale.)

Does anybody know what it is?