Somehow or another we wound up with a traffic light on our back deck. It’s been rewired along the way so that when plugged in, all 3 lights come on. One spring a starling couple found the hole in the top of the light box and decided to set up an apartment in there. Since then, we have them nesting in the traffic light each spring. We never plug it in during nesting season. I don’t know if it is the same pair each time, but I imagine so.