https://www.allaboutbirds.org/guide/Ruffed_Grouse/lifehistory

Food Omnivore Ruffed Grouse feed almost exclusively on vegetation, including leaves, buds, and fruits of ferns, shrubs, and woody plants.

https://birdsna.org/Species-Account/bna/species/rufgro/foodhabits

Ruffed Grouse preferred to feed on buds in upper canopy of mature male ... In feeding trials, captive Ruffed Grouse successfully harvested plant material in 80.7  ...

https://www.michigandnr.com/publications/pdfs/huntingwildlifehabitat/landowners_guide/Species_Mgmt/Ruffed_Grouse.htm

Dec 12, 1999 ... Ruffed grouse live in 34 of the 49 continental states and in all ... provide the most important year-round food sources in the form of green leaves, ...

https://www.ruffedgrousesociety.org/grouse-facts

RANGE Ruffed Grouse (Bonasa umbellus) are the most widely distributed resident ..... A favorable combination of weather factors and food resources may allow ...

http://deertrail.us/minnesotawildlife/minnesotawildlife/ruffedgrouse.html

A ruffed grouse lives most of its life within just a few acres. Thick brush, with small clearing and availibity of feed, is what most likley attracts the grouse to the ...

https://www.dnr.state.mn.us/birds/ruffedgrouse.html

When a ruffed grouse flushes from underfoot, the loud sound can startle even experienced outdoors ... Insects are the primary food of ruffed grouse chicks.

https://northernwoodlands.org/outside_story/article/why-ruffed-grouse-take-winter-in-stride

Jan 7, 2010 ... In winter, however, with most of these food sources buried by snow, the ruffed grouse changes its diet, moving to buds, twigs and catkins.

http://www.birdweb.org/Birdweb/bird/ruffed_grouse

Ruffed Grouse habitat, behavior, diet, migration patterns, conservation status, and nesting. ... common resident. Sound To Sage. Listen. Source of Bird Audio ...

https://www.pgc.pa.gov/Wildlife/WildlifeSpecies/Documents/Ruffed%20Grouse%20Habitat%20Management.pdf

The key to managing young forests for ruffed grouse is providing habitat components that .... Winter survival depends on thick cover and diverse food sources.

https://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb1257860.pdf

FOOD. Aspen trees provide the most important year-round sources of food for ruffed grouse in the form of green leaves, flower buds and catkins. In most winters  ...