I  just added a small collection of illustrated butterfly wings to the etsy shop. The wings are placed on antique envelopes dating back to the 1940's.  I think that the fresh illustrations compliment the aged paper so nicely.   While both subjects are delicate, they each stand the test of time in such a unique way. I was hunting around the Internet reading about butterfly symbolism and found a quote that fits the collection -

"Even in death, their mounted beauty can remain intact for centuries." R. Gagliardi

Visit them here.