I love drawing birds and flowers. Here’s one of the flower I finished recently. It’s from a reference photo on pixabay. It’s colored pencils on vellum. Not sure how long it took to finish, I tend to draw while watch dr who :).
OriNebula ( or OrionNebula)
Edit. - that one isn’t on vellum. It’s a basic sketch paper. Will post the other on when I find the photo again.