36 GAME BIRDS AND WILD FOWL. 



Diagnostic Characters. — Tetrao, with the tail nearly 

 square, and the wing more than 12 inches in length. Approxi- 

 mate length, 26 inches. Hybrids are pretty frequent in a wild 

 state between the Black Cock and the female Capercaillie, the 

 latter being much given to wandering from their usual haunts 

 and pairing with Black Game during these peregrinations. 



