NPS/Neal Herbert
A male ruffed grouse claims his territory in the forest near Mammoth Hot Springs. During this ritual display, the grouse beats its wings in a series of thumps that builds to a resonant crescendo, the bird's wings blurring with speed.
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Last updated: June 1, 2016
P.O. Box 168 Yellowstone National Park, WY 82190-0168
(307) 344-7381
