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FAMILY, TETRAONIDA.—THE GROUSE. 
The Tetraonide are characterised among gallinaceous birds by their densely 
ft feathered tarsi and by the feathers of the nasal groove which fill it and conceal 
_ the nostrils. The toes are usually naked (feathered to the claws in the Ptarmi- 
_ gans), and with pectinations of scales along the edges. The orbital region is 
pecmerally bare with a naked stripe above the upper eyelid ; some have an inflatable 
air sac on the side of the neck. 
The species of Tetrao and Bonasa inhabit wooded regions ; Lagopus belongs to 
_ the Arctic portions of the continent and generally become white in the winter. In 
_ Ontario we have the following members of this family. 
-Richardson’s Dusky Grouse. 
_ Spruce Partridge, Canada Grouse. 
Ruffed Grouse. 
Sharp tailed Grouse. 
Willow Ptarmigan. 
Rock Ptarmigan. 
