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Close up of selecti8ve focus of beautiful but dangerous American Bison Buffalo inside the forest in Yellowstone National

Close up of selecti8ve focus of beautiful but dangerous American Bison Buffalo inside the forest in Yellowstone National

Rasta Bison

Yellowstone National Park stampeding Bison in winter

Yellowstone National Park stampeding Bison in winter

American bison family cross a road in Grand Teton National Park, Wyoming

American bison family cross a road in Grand Teton National Park, Wyoming

Yellowstone National Park Bighorn sheep closeup in winter

Yellowstone National Park Bighorn sheep closeup in winter

Lower Falls of the Yellowstone River, Yellowstone National Park, Wyoming

This is nearly the same view depicted in the 1872 sketch by Thomas Moran, and printed for the 150th anniversary commemoration of the Department of the Interior. The splendid yellow-brown walls of the canyon consist predominantly of rhyolite tuff and lava (Sulfur Creek Tuff and Canyon flow, respectively), which were erupted nearly 500,000 years ago. Both units have been intensely altered by hydrothermal fluids. Location: Yellowstone National Park, WY, USA Photographer: Stewart Tomlinson, USGS. This is nearly the same view depicted in the 1872 sketch by Thomas Moran, and printed for the 150th anniversary commemoration of the Department of the Interior. The splendid yellow-brown walls of the canyon consist predominantly of rhyolite tuff and lava (Sulfur Creek Tuff and Canyon flow, respectively), which were erupted nearly 500,000 years ago. Both units have been intensely altered by hydrothermal fluids. Location: Yellowstone National Park, WY, USA Photographer: Stewart Tomlinson, USGS

Bull elk with magnificent rack, resting amongst the wild grass in Banff national park, Alberta, Canada.

Bull elk with magnificent rack, resting amongst the wild grass in Banff national park, Alberta, Canada.

YELLOWSTONE, MONTANA, USA MAY 24, 2018: Unidentified people walking in the border of a clif and enjoying the view of

YELLOWSTONE, MONTANA, USA MAY 24, 2018: Unidentified people walking in the border of a clif and enjoying the view of

Old Faithful Geyser

Old Faithful Geyser

Mountain Pine Beetle Damage

Mountain Pine Beetle Damage — Mountain pine beetle have been a natural part of the whitebark pine forest for many, many years. Their population size (and thus the severity of their damage) was naturally controlled by extremely cold winter temperatures. But recently, winter temperatures have not been cold enough to kill the beetles and their populations have increased. Whitebark pines also used to be healthy and vigorous trees because of ample precipitation and moderate summer temperatures. However, a changing climate has physiologically stressed the trees, making them susceptible to beetle infestations. This on-two punch makes it difficult for the trees to defend themselves. At USGS, researchers are monitoring the health of productivity of these forests to determine the importance and impact of changes in pine nut production on grizzly bears in the Greater Yellowstone Ecosystem. Photo credit: Don Becker, USGS

Where the buffalo roam

Where the buffalo roam

The Firehole River in Yellowstone National Park, Wyoming. To the right is the runoff from Excelsior Geyser into the river. en.wikipedia.org/wiki/Firehole_River en.wikipedia.org/wiki/Excelsior_Geyser More photos from our road trip are here: www.flickr.com/photos/thadz/albums/72157660032324601

The Firehole River in Yellowstone National Park, Wyoming. To the right is the runoff from Excelsior Geyser into the river. en.wikipedia.org/wiki/Firehole_River en.wikipedia.org/wiki/Excelsior_Geyser More photos are here: www.flickr.com/photos/thadz/albums/72157660032324601

Bull elk with magnificent rack, resting amongst the wild grass in Banff national park, Alberta, Canada.

Bull elk with magnificent rack, resting amongst the wild grass in Banff national park, Alberta, Canada.

YELLOWSTONE NATIONAL PARK, WYOMING, USA - JUNE 07, 2018: Outdoor view of two white-tailed family deers crossing the sand

YELLOWSTONE NATIONAL PARK, WYOMING, USA - JUNE 07, 2018: Outdoor view of two white-tailed family deers crossing the sand

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