With tape in hand you might just mount the butterflies flat using the tape. And that would look just fine.
Or consider using a Glue Dot or a small piece of Dimensional Foam to raise the butterfly up a bit and then bend up the wings. Now you have a butterfly that looks like its flying.
Here is a comparison of the 3 ways to mount a punched embellishment
By the way: the butterfly was created using Stampin'UP!'s Bitty Butterfly punch. This punch and the matching stamp set - Papillon Potpourri - are part of the September special.
Save 15% when you get both the Papillon Potpourri stamp set and the Bitty Butterfly punch.