Can micro be outdoors?
I think being captive is important.
My best yield was outdoors, 1.5ft high and I looked at that as micro. I got 18 z's off it! But micro all the way. It even started life in my pc, lol. It was hidden in plain site right between my house and a public road, about 20 metres to each, clear site except for the grass and the odd tree. Even had some workers trudge a few metres past it one day.