Wall Birds

Two years ago I decided to start finding uses for the stacks of old calendars and scrap paper I pack around with me like a greedy hermit crab. I began to sketch birds drawn from field guides onto the more undesirable side of my paraphernalia — the tree is made from the ghost prints of an old woodblock I did ages ago — and cut out the forms with an X-acto. This project became one of the few art exercises I've done recently that didn't consume my mind with concept or execution — it was just scrap paper! I wasn't worried how they turned out, and this ended up being very liberating. Next up: how to mount them to the wall without using tape ... suggestions?