How to remove the wings from dried butterflies. (There is more, but I'm not currently interested in glass mounting.) I have had reasonable success with multiple coats of polyurethane varnish and then gluing the wing to a light metal frame/support for mounting. Small spiral at top worked well until I wore the big luna moth earrings in strong wind. They whipped around so much that the varnish began to separate from the wing.
A Modern Way to Display Pressed Botanicals. Start by gathering some dried flowers or leaves. Next gather 2 clear panes of glass and clean them well. Arrange your plant material as you would display it and dab a wee bit of white glue to keep the pieces in place. Add second glass pane to the back of the first, sandwiching in the plants, and use friction tape or binder clips to secure it.