I lost two this past winter the first was a BS peahen she was the first peachick I ever hatched she would of been 18 years old this summer the second was the first silver pied I ever hatched he would of been 16 years old this summer, I have metal roofs on all my sheds attached to my pens where my birds decide weather they want to be inside or out, I think something frightened the hen because I found her under the roost in the shed with her neck twisted back but the male was laying in shed so both died in there enclosed shed that have a 18" x 2' doors. I have a lot of predators here, have lost a few chickens to predators but never a peafowl directly but have had a few with what seems like broken necks, we get a lot of snow so I have extra supports holding my netting and if they get scared ant hit these just right it could break there necks, have seen a lot of different predators on my farm so there are predators on occasion near my pens that could of scared them, These are part of life when you live in the country surrounded by fields and woods and only a few houses. A lot of traffic on road, so I do not have a dog that I can let roam just one in a kennel and she lets me know when anything or anyone strange comes to the house or out at barn.
I would say 90% of the time they roost out side I let them decide where they want to be, and we have had some cold weather I know my trail camera had a temperature of -26 one night this past winter on one of it pictures, and we have a lot of nights with below zero temps and they are sitting outside it seems like rain or snow before dark will make them roost inside but I have seen them covered in snow and ice on occasions but roosting outside when they are calling for wind chills of 40 below
The other 27 I have survived the winter so far no frost bit toes and no added heat almost lost a pen one time with heat lamps so will not use them as added heat with larger birds.