Our local zoo had the building that housed the peafowl burn down, all of the peas died.  They said it was caused by the heater, but didn't say what they used for heat.  I imagine that would be a horrible way to die too.  How does one know for sure that a bird froze to death without having a necropsy done?  I have never had a bird freeze to death.  I did have a case where we had temps in the 90's on Oct 1st, then on Oct 5th we had temps in the lower 30's and got hit with a bad blizzard with 16" of heavy wet snow. I had a turkey hen with her 6 babies still loose outside and they all got separated and disappeared.  Since the babies were only 2 1/2 months old, I figured I lost them.  They showed up one or two at a time over the next few days, and none were lost.  I was amazed!  I also had a White Holland turkey take off after their building collapsed under the snow load a few years ago.  I couldn't find her, and finally gave up.  It was December and I figured either the weather of predators got her.  We had a lot of snow, a few major blizzards, and some really cold weather that winter.  The following March, a neighbor called to say there was a white turkey hen in her yard.  I got my girl back.  I have no idea of where she was or what she ate, but she made it through the winter on her own.