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en.wikipedia.org/wiki/Grouse

Male grouse tend to be larger than female grouse, which seems to hold true across all the species of grouse, with some difference within each species in terms of how drastic the size difference is. The hypothesis with the most supporting evidence for the evolution of sexual dimorphism in grouse is sexual selection.

www.ruffedgrousesociety.org/grouse-facts

Ruffed Grouse tend to be less numerous and less productive if they live in regions where they cannot burrow in snow and feed on aspen. There also seems to be a poorly understood relationship between the color-phase of a Ruffed Grouse and its ability to survive severe wintering conditions, and its vulnerability to predation.

en.wikipedia.org/wiki/Ruffed_grouse

The ruffed grouse (Bonasa umbellus) is a medium-sized grouse occurring in forests from the Appalachian Mountains across Canada to Alaska.It is non-migratory.It is the only species in the genus Bonasa.. The ruffed grouse is sometimes incorrectly referred to as a "partridge", an unrelated phasianid, and occasionally confused with the grey partridge, a bird of open areas rather than woodlan...

www.adfg.alaska.gov/index.cfm?adfg=smallgamehunting.ruffedgrouse

Ruffed grouse do not form large flocks in fall and winter, as ptarmigan and sharp-tailed grouse usually do, but sometimes groups of six to ten birds stay together for weeks at a time. People who hunt ruffed grouse often hang up their guns in late October because the birds seem to vanish from the woods at that time.

www.answers.com/Q/Where_does_the_ruffed_grouse_live

The Ruffed Grouse also commonly reffered to as a partridge, can be found in forests across Canada and the Appalachian Mountains. It can also be found in the northern United States including Alaska.

www.animalspot.net/ruffed-grouse.html

The Ruffed Grouse (pronunciation: ruft growz) is a North American grouse that hovers through the woodlands, and are hard to locate.Belonging to the order ‘Galliformes’, they are related to chickens, turkeys, pheasants, and quail, and spend most of their lifetime in the forests.

www.birdweb.org/birdweb/bird/spruce_grouse

Spruce Grouse live in dense pine and spruce woods with mossy ground in northern montane environments. They are roughly distributed in an elevational gradient with Ruffed and Blue Grouse, with Spruce Grouse occupying the highest elevations, typically above 4,000 feet in Washington, although there is a wide altitudinal overlap.

www.allaboutbirds.org/guide/Ruffed_Grouse/lifehistory

The dappled, grayish or reddish Ruffed Grouse is hard to see, but its “drumming on air” display is a fixture of many spring forests. It can come as a surprise to learn this distant sound, like an engine trying to start, comes from a bird at all. This plump grouse has a cocky crest and a tail marked by a broad, dark band near the tip.

www.sagegrouseinitiative.com/sagebrush-community/the-habitat

Sage grouse do best with very little human disturbance. In fact, new 2013 research by USGS sage grouse scientist Stephen Knick shows that 99 percent of active leks (breeding areas) are in areas with less than 3 percent of development. Knick looked at 3,000 leks within a 355,000 square-mile portion of the sage grouse historic range.

defenders.org/sage-grouse/basic-facts

Adult females range from 19-23 inches. Sage-grouse are larger than domestic chickens, to which they are often compared in the news media. Weight: Males average 6 lbs; females half as much. Lifespan: The average lifespan is 1-3 years, although sage-grouse have been known to live up to 10 years.