#BIO60_2021 Wing of a Fly. I found a fly that had died on a windowsill in my house. To examine its wing, I used scissors to detach the wing from the body and placed the wind on a glass slide and placed a glass covering over it. I was very curious to see the structure of the wing, but what surprised me was that there was some substance on the wings. I am not exactly sure what it is or if it was originally on the wing during the fly’s life.