Very possible to be the world's first Solar Heated Duplex Birdhouse according to a Thermal Engineer.

Hi Everybody. Here it is and this is what I said was being studied and tested at the University here in Las Vegas. It works on a principal in thermodynamics called the thermo-siphoning technique. Less dense air rises and cooler air takes it’s place at the bottome. I first saw this principal demonstrated up on Long Island in the Brookhaven National Laboratories. They were heating a house with it. Sure this one only works when there is sunlight but some simple add ons can be done also for heat storage. I live with parrots and I have a pretty good idea how much they like living inside of a humans house, and how very quickly it becomes their house and they just let you be there. Enjoy.

-- Rich, Nevada,