RUFFED GROUSE 165 



(blackhead) is of the greatest pathological importance. Blackhead 

 is a common and serious disease of poultry and of captive game birds 

 and has also been found in a number of cases of ruffed grouse collected 

 in their natural covers. 



" The group Sporozoa is represented by two species of Eimeria, 

 which are responsible for the disease coccidiosis, which is not only 

 important in grouse raised in captivity, but, as in the case of black- 

 head, is also found in grouse killed in a natural habitat." 



DISTRIBUTION 



Range. — United States, Canada, and Alaska; north to the limit 

 of trees. The species is nonmigratory. 



The range of the ruffed grouse extends north, to Alaska (Nulato, 

 Tanana, Kampart, Fort Yukon, and the Porcupine River) ; Mac- 

 kenzie (Roche Trempe 1'Eau, Fort Simpson, Fort Providence, Fort 

 Rae, and probably the Slave River Delta) ; Manitoba (Hairy Lake, 

 Oxford House, Knee Lake, and York Factory) ; northern Ontario 

 (Martin Falls, probably Fort Albany, and Moose Factory) : Quebec 

 (Lake Mistassini) ; and Labrador (Hamilton Inlet). East to 

 Labrador (Hamilton Inlet and Sandwich Bay) ; southeastern Quebec 

 (Wolf Bay, Natashquan, and Perce) ; Nova Scotia (Baddeck, James 

 River, Musquodoboit, and Halifax) ; Maine (Calais, Columbia Falls. 

 Mount Desert, and Portland) ; Massachusetts (Boston and Cape 

 Cod) ; New York (Shelter Island) ; New Jersey (New Brunswick 

 and Vineland) ; Maryland (Laurel) ; Virginia (Bush Hill and Sur- 

 rey) ; western North Carolina (Roan Mountain, Mount Mitchell, and 

 Black Mountain) ; western South Carolina (Caesars Head) ; and 

 northern Georgia (Brasstown Bald and Grassy Mountain). South, 

 to northern Georgia (Grass} r Mountain and Cloudland) ; north- 

 eastern Alabama (De Kalb County and Long Island) ; western 

 Tennessee (Danville) ; southern Missouri (Holcombe and Current 

 River) ; formerly northwestern Arkansas (Fa3^etteville) ; formerly 

 eastern Kansas (Manhattan) ; rarely Colorado (Estes Park and 

 Sweetwater Lake) ; southwestern Wyoming (Fort Bridger) ; north- 

 ern Utah (Parleys Park and Barclay) ; central Idaho (Lardo) ; and 

 northern California (Oak Bar and Eureka). West to northwest- 

 ern California (Eureka) ; Oregon (Anchor, Empire, Eugene, and 

 Tillamook) ; Washington (Vancouver, Cougar, Olympia, Elkhorn 

 Ranger Station, Elwha River, Ozette Lake, and Neah Bay) ; British 

 Columbia (Alberni, Parksville, Nootka Sound, Fort Rupert, Port 

 Simpson, and Hastings Arm) ; and Alaska (Juneau, Tanana Cross- 

 ing, Lake Minchumina, Tacotna, Akiak, Russian Mission, and 

 Nulato) . 



74564—32 12 



