So you're going to upgrade your own living arrangements and leave your birds with the 1st-grade bird house you made when your motor skills were on par with your dog's? If you've got a little extra to spend, why not treat the flying creatures outside your window with an ultra-sleek modern bird house. This one is appropriately titled "Wave," though other names include "The Trailer" and "Teardrop."

Shop: KoolBird
What: "Wave" Bird House, $120