Here are the recent answer to this question.
By liz (Guest Post)02/24/2009
Gallon detergent bottles-Place with mouth of bottle faceing to the front-Hang from handle on top-For small birds leave in pouring spout-For large birds take out by pulling with pliers.
Make a Bird House - Turn the bottle on its side. Cut little windows/doors high up on the sides. Paint or cover the bottle with fabric. Hang from tree branches for birds to nest in.I found this at Make-Stuff.com
Add your voice to the conversation. Click here to answer this question.