What kind of birds do you have? If you have rustic, shabby-chic loving birds, then your standard wooden bird house will do. But if your birds are the cutting-edge, futuristic type, then they might be interested in Etsy seller Red Yellow and Blue Ink's colorful bird feeders out of industrial materials like stainless steel cable and cell cast acrylic. Two of her bird feeders are made specifically from miscellaneous reclaimed pieces, like traffic signal lenses...
The Upcycled Traffic Lights Bird Feeder is $50 — $3.00 of which will go to the National Audubon Society. The Reclaimed Acrylic Catch-All/Mini Bird Feeder is $24 and, as you can see from the picture, has a lot of potential uses other than as a bird feeder.
Your birds have never looked so cool.