This bull Elk (Cervus canadensis) was the king of his particular domain. Rutting bulls can be very aggressive so we kept our distance from him. Here he's checking behind him for challengers or rivals approaching his harem of about 30 females. There were none. Banff National Park, Alberta, Canada

Tags:   Autumn Canada Canadian Rockies Fall Nature Rocky Mountains Cervus canadensis

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Big, bad bull Bison (Bison bison) or "Plains Bison" taking a break on the river bank. Bison are the largest land animals in North America. Yellowstone National Park.

Tags:   Nature Wild Animal Wildlife Winter Yellowstone National Park Bison Bull Bison bison North America's Big 5 Horns Eye Contact Eye Level

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This Bison (Bison bison) and a couple of his buddies were feeding in an area right next to the road. We love the Bison's eyes - if you zoom in and look into his left eye, you can see the photographers (maintaining a safe distance of course). The details in this portrait make it a "keeper" for us - the eye, the pine needles in his fur, the light-colored hairs around his mouth. Yellowstone National Park.

Tags:   Bison Bison bison Eye Contact Eyes Horns Nature Wild Animal Wildlife Winter Yellowstone National Park

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This Coyote was busy following the trail of a rodent, when it got distracted by the group of humans taking its picture from the road below. Not much snow cover in late February in Yellowstone this year, as you can tell from this image. Yellowstone National Park.

Tags:   Nature Wild Animal Wildlife Winter Yellowstone National Park Coyote Eye Contact Predator Hunt Canine

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Two large bull Caribou (Rangifer tarandus) feed in the fall tundra, Denali National Park, Alaska.

Tags:   Alaska Autumn Caribou Denali National Park Fall Nature Rangifer tarandus Wild Animal Wildlife Environmental Habitat Tundra

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