Cover Preferences, Seasonal Movements, and Food Habits of Richardson's Grouse and Ruffed Grouse in Southern Idaho
From September 1938 to September 1940, while carrying on field studies of fur-bearers in the Boise National Forest in southern Idaho, I gathered data on Richardson’s Grouse (Dendragapus obscurus richardsoni) and the Idaho Ruffed Grouse (Bonasa umbellus phaios) with a view to determining their occurrence in the various timber types and other cover, their seasonal movements, and their food habits.3 All of the field work was done on foot or on snowshoes, most of it in the vicinity of the Deer Park Guard Station in the center of the Forest, although trips were made to various other places in the Boise, as well as to the Payette and Idaho National Forests. A wide-ranging bird dog was used when the ground was not covered with snow. These particular grouse were chosen for study because, of the six upland game birds native to Idaho, only these two have borne a substantial hunting burden since 1937, and ecological data concerning them were particularly desirable as a basis for planning management to increase their numbers.
Marshall, William H. 1946. Covering preferences, seasonal movements, and food habitats of richardson's grouse and ruffed grouse in southern idaho. Wilson Bulletin. 58(1):42-52.