Our state simply does not have anywhere near the open spaces needed to have a decent pheasant population. Pheasants are one of the precious few introduced species that do not out compete some or many natives for food and habitat. As such, they are wildly popular among hunters here in the states. Unlike many fish species that have been introduced into non native waters, pheasants have found a home here in parts of North America without damaging other species.
Add to that we have no more quail, and no more grouse. Not much in the way of plentiful upland game anymore like a half century ago.