Donald M. Jones / Ruffed Grouse (Bonasa umbellus) in defensive display, Yaak, Montana

Donald M. Jones / Ruffed Grouse (Bonasa umbellus) male in spring, western Montana

Gerrit Vyn / Ruffed grouse (Bonasa umbellus) displaying neck "ruff". The ruff is most often displayed once a female is present. Okanogan County, Washington. April.

Gerrit Vyn / Ruffed grouse (Bonasa umbellus) male displaying neck "ruff". The ruff is most often displayed once a female has been attracted by the males drumming and is present. Okanogan County, Washington, USA Ap...

Matthias Breiter / Ruffed Grouse (Bonasa umbellus) male drumming, Kenora, Ontario, Canada

Michael Quinton / Ruffed Grouse (Bonasa umbellus) male in courtship display, North America

Michael Milicia/ BIA / Ruffed Grouse (Bonasa umbellus), Alberta, Canada

Scott Leslie / Ruffed Grouse (Bonasa umbellus), gray morph, male displaying in autumn, Cape Breton Highlands National Park, Nova Scotia, Canada

Mark Raycroft / Ruffed Grouse (Bonasa umbellus) in snow, North America

Mark Raycroft / Ruffed Grouse (Bonasa umbellus) in snow, North America

Mark Raycroft / Ruffed Grouse (Bonasa umbellus) in snow, North America

Jeff Vanuga / Ruffed grouse (Bonasa umbellus) drumming on log during spring mating ritual, Grand Teton National Park, Wyoming, USA, May.