390 ON THE BIRDS 



II. Tetrao. 



Tetrao, Vieill. Coqs de bruyeres, Cuv. Tetrao. Bonasa, 

 Stephens. 



Tarsus wholly feathered, toes naked. Not varying much 

 with the seasons. Found in temperate climates, even at a com- 

 paratively low latitude, and in level as well as mountainous 

 countries. Flesh dark coloured. 



3. Tefrao urogallus, L. 



Bearded : tail much rounded, of eighteen hroad rounded 

 feathers ; hill white. 



Male ; glossy black, breast with greenish reflections. 



Female and young : mottled. 



Wood Grouse, Lath. Penn. Brit. Zoo], pi. M. male ; pi. 

 N. female. 



Inhabits mountainous forests of Northern Asia and Eastern 

 Europe ; less abundantly in central and south-eastern Europe. 



4. Tetrao urophasianus, Nob. 



Tail cuneiform, of twenty narrow, tapering, acute feathers. 



Male : black ? 



Female and young ; mottled. 



Cock of the Plains, Tetrao urophasianus, Nobis. Am. Orn. 

 iii. pi. 21, fig. 2. 



Inhabits the extensive plains between the Missouri and the 

 Rocky Mountains. Size of the preceding, and the largest of 

 North American Grouse. 



5. Tetrao hybridus, Sparrm. 



Slightly bearded; tail hardly forked, of eighteen feathers: 

 bill black ; tarsus two inches long. 



Male : glossy black, breast with purple reflections. 



