We have a small collection of cased entomology at home. It’s mainly lepidoptera, but there are a few other things in there too, bees, beetles etc. It’s small because I don’t kill creatures for the collection, and so the only time I add to it is when I encounter an already deceased specimen that is still in a good enough condition to be preserved for display.
Today I stumbled upon a butterfly in good condition which had expired on a footpath above Hebden Bridge. If it dries out ok, hopefully it will make a nice addition to our (rather limited!) case.