1) Chunky game bird 
The ruffed grouse (Bonasa umbellus) is a medium-sized grouse occurring in forests from the Appalachian Mountains across Canada to Alaska. It is non-migratory. The ruffed grouse is sometimes incorrectly referred to as a `partridge`, an unrelated phasianid, and occasionally confused with the grey partridge, a bird of open areas rather than woodlan.....
North American game bird sometimes called a partridge. See grouse.[2 related articles]
[n] - valued as a game bird in eastern United States and Canada
partridge 3 Bonasa umbellus noun valued as a game bird in eastern United States and Canada
a North American grouse, Bonasa umbellus, having a tuft of black feathers on each side of the neck. See illus. under