24 to 26 days for Common Chinese Ringnecked pheasants. Don't want to 'burst your bubble' but I doubt the eggs will be fertile....incubate them for about 8 days and then candle them, if fertile, you'll see veins and the spider(embryo).
Just re-reading this post, cause I got an alert, anyhow, I'm further South than you are muddy and I've had a ringnecked hen go broody and actually hatch out 8 chicks....I don't think :confused: location has as much to do with them going 'broody' but more of a matter of environment/habitat!
They will occasionally get on a perch, as far as roosting, most of the time they roost on the ground. So, it's imperative to have wire siding that predators can't reach through and grab your birds. Either 1/2" HC or 1/2" x 1" welded wire, at least 3 feet up the sides.
A proper enclosure, well landscaped, proper feed ration, clean water and protection from the elements and predators goes a long way to keeping birds happy.
Be careful of what you read on the net, some of it is good and most is down right harmful.
She might or might not... I have a friend that had some Goldens in with her peafowl, the male peacock killed the male Golden, apparently the Golden was running underneath the the peacock, chasing the female Golden and displaying. It just finally couldn't take it anymore and killed him.