Birds breed in the UK in the uplands of the north and west and are resident all year round, travelling very little in their lives. Both the male and female are 40–50 cm (15.5–19.75 inches) long, with a black band on the fan-shaped tail. For most of the year blue grouse live in coniferous forests feeding exclusively on evergreen needles. They readily perch in trees, and do most of their feeding there in winter. 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. Common in the north woods but very easy to overlook, the Spruce Grouse eludes many birders who seek it. In July the cock birds will migrate from the breeding location, usually uphill if it is an open slash area. The best-known North American species is the ruffed grouse (Bonasa umbellus).In New England it is generally called a partridge, although it is not a true partridge.Ruffed grouse live mainly on berries, fruits, seeds, and buds but also take much animal food. Red grouse are especially associated with heather; black grouse prefer a mixture of heather, rushy areas, rough grass and woodland edge; capercaillies survive best where pine woodland intermingles with boggy heath and plentiful supplies of bilberry, cranberry and crowberry. Grouse They feed on shoots, buds and seeds of small shrubs and herbs. It has a short tail and a lightly hook-tipped bill. On average the birds live between three and six years, though some can live up to nine years. They actually migrate to high altitudes and heavy snows. Spruce Grouse are usually solitary in summer, but in winter they may gather in loose flocks. The red grouse is a medium-sized game bird. As winter approaches, they start heading high up into the mountains. Sage grouse do best with very little human disturbance. Grouse / ɡ r aʊ s / are a group of birds from the order Galliformes, in the family Phasianidae.Grouse are frequently assigned to the subfamily Tetraoninae (sometimes Tetraonidae), a classification supported by mitochondrial DNA sequence studies, and applied by the American Ornithologists' Union, ITIS, and others. But dusky grouse do the reverse. In the summer, they feed on forbs and insects in low elevation foothills. It is reddish-brown, with its legs and feet covered in pale feathers. These grouse are found in the Rocky Mountains and western Canada. Knick looked at 3,000 leks within a 355,000 square-mile portion of the sage grouse historic range. There, they’ll live in the boughs of pine trees. Absurdly tame, it may sit motionless while observers pass by just a few feet away, and it may thus go unnoticed.