The Japanese quail (Coturnix coturnix japonica) was imported into the United States from Japan. It should not be confused with the bobwhite quail or other indigenous quail species. Coturnix are widely distributed in Europe, Africa and Asia where they are regarded as a migratory species.

The arrival of cold and snow doesn't necessarily mean a death sentence for quail. In fact, these hardy birds can do remarkably well even in tough winters provided quality winter cover is available. Winter habitat includes grass cover for roosting at night, trees and shrubs to loaf in during the day, and food. In order to keep them covered, we currently just have them in what looks more like a big cage with a roof. Which was actually made for our 3 legged cat at the time.
In the wild quail naturally live under shrubs and keep cover. They are small and easily caught by predators. If you are going to keep them in a cage on the ground, be sure to keep them protected, and clean out their bedding every so often.