Mail Me Art

I do like to draw on an envelope yessir, so I decided to take part in Mail Me Art 3: Short & Sweet, in which 200 people send decorated envelopes to Mail Me Art, and then there is a show in the summer and a book. You are supposed to not mind when bits fall off your art in the post, but probably it is rash to stick so many bits on in the first place?
I was trying to make a collage in the way I make screenprints, taking the shapes from photocopier-enlargements of tiny doodles. I originally drew these birds on the back of an envelope, which seems nicely circular.