A young wolf May 13 playfully chases off ravens feeding on a carcass the Junction Butte pack killed earlier at Lamar Valley in Yellowstone Nat…

Waldo Montgomery of Belton points the way to Yellowstone wildlife as his faithful companion Dawson looks on. Montgomery enjoys the fact that s…

A collared wolf that is a member of the Junction Butte pack can be seen May 14  in Yellowstone National Park.

A "red dog" bison calf stands near its mother May 9 at Yellowstone National Park.

Visitors take photos as they look over the natural features of Mammoth Hot Springs Terraces at Yellowstone National Park.

Terraces are among the many natural features at the Mammoth Hot Springs portion of Yellowstone National Park.

Two wolves from the Junction Butte Pack return to a bison carcass to eat leftovers May 13 at Yellowstone National Park.

Bald eagles join ravens May 13 at the scene of a buffalo kill by the Butte Junction wolf pack at Yellowstone National Park. Some regular obser…

A mother and two bear cubs forage May 13 in Yellowstone National Park.

A member of the Junction Butte wolf pack crosses the road May 13 in front of Waldo Montgomery's truck to get back to some leftover food in Lam…

A member of the Junction Butte wolf pack prepares to cross the road May 13 in front of Waldo Montgomery's truck. Five wolves eventually crosse…

Two moose graze May 13 near the road to Cooke City, Mont., in Yellowstone National Park.

A coyote watches for danger May 13 after warily approaching a bison carcass in the Lamar Valley of Yellowstone National Park. The bison was ki…

A coyote warily approaches a bison carcass May 13 in the Lamar Valley of Yellowstone National Park. Members of the Junction Butte wolf pack ha…

Waldo Montgomery gets a scenic shot May 13 of his faithful companion Dawson, a miniature¬†American Eskimo dog, in front of some Yellowstone fal…

A black bear feeds in mid May in Yellowstone National Park. The animals come out of hibernation hungry and will eat grubs, moths and much larg…

A black bear checks out some wildlife watchers at Yellowstone National Park. In this case the photo was taken with a long lens and the watcher…

Waldo Montgomery of Belton and his miniature American Eskimo dog Dawson take in the scenery in Yellowstone National Park during a May 2019 vis…

A grizzly took a break from a carcass in Yellowstone National Park, letting members of the Junction Butte wolf pack have some dinner. Bears of…

A coyote decides to give people checking out wildlife a closer look -- within about 10 feet -- before heading down a trail at Lamar Valley in …

A coyote crosses in front of signs at a pullout on the Lamar Valley in Yellowstone National Park on May 15. The right sign shows park visitors…

A lone coyote looks around the Lamar Valley in Yellowstone National Park on Monday, May 13. The coyote looked in the direction of a pronghorn …

A coyote checks out the landscape before heading down a trail at Lamar Valley in Yellowstone National Park on May 15. The animal had seemed ob…

A pronghorn grazes alone in the Lamar Valley of Yellowstone National Park on May 13. The fastest land animal on the North American continent i…

A pronghorn nears the bank after swimming across the Lamar River in Yellowstone National Park in mid May, braving the currents caused by snow …

A raven flies over a wary coyote in the Lamar Valley of Yellowstone National Park in mid May. Both were looking to scavenge some food, with th…

A raven flies in Lamar Valley in Yellowstone National Park on May 15. The bird often flocks to the sites of killed animals, leading wolf watch…

Wolves share a meal with grizzly bears at Yellowstone National Park.

A bison rolls in the dust near the Lamar River in the Lamar Valley of Yellowstone National Park on May 13.

If you look carefully at the photo you can see the most dangerous animal to humans in Yellowstone National Park. A herd of bison appears to be…

Two adult bison don't appear to be concerned at the carcass of another bison in the Lamar Valley of Yellowstone National Park on May 13. Wolve…