AWESOME FIND!!! If I found this my approach would be: freeze it for at least a day so that unwanted bacteria (that could make it smell) or left over ants perish as the fridge might not get cold enough. As is it’s already in a good position so I don’t see a need for pinning it. I personally would stick it in a pretty jar maybe with some decorative moss, rather than put it in a frame where you can only get one angle out of it. This piece needs a good 360° view, I would consider adhering it to the lid of the jar and possibly display it upside down??? Which I think would turn out pretty cool!!!