I have 2 male red golden pheasants. I live in NW Oregon, where it really doesn't get that cold. Mid 20s at its very coldest and not for extended periods of time. I put my chickens in at night but leave the pheasants out in the run. There are plenty of sheltered roosting areas, some more sheltered than others. They always sleep in the same corner that has cover and a fence on one side. How cold is too cold to leave them out? Because I CAN catch them if I need to and make them stay in the coop. It is big enough, with lots of open perch places and they like to go in there sometimes during the day, but not at night.