ナショナルジオグラフィックのインスタグラム(natgeo) - 9月23日 03時03分

photo by: @drewtrush The Elk rut is on and in full swing in the Greater Yellowstone Ecosystem. This bull was so worked up chasing his harem of cows that the steam was just rolling off his body. If I have a favorite time of year and favorite thing to photograph, this is it. #elk #greateryellowstoneecosystem #gye #rut #fall

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