Just a couple of months old, this pronghorn fawn prances away from Mom.
Young bison calf keeping up with mom.
A young bison calf, still damp from birth, is already up on wobbly legs and sticking close to mom.
Mid-April but still no green grass for this troop of bison.
Pronghorn female near the Lamar River with May's ever-present snow flurries.
That horn reveals a long life.
Boys will be boys! Two bison in a shoving match.
Pronghorn female looking good in October, ready for winter.
Sun-framed pronghorn. His horns may eventually reach 12-14 inches or more.
Time for a snooze - a bison enjoys a warm day.
Bison calf just a few days old. They lose the umbilical cord at about a week old.
What's up with the raised eyebrow?
Female pronghorn scans Soda Butte Valley. It's that time of year so maybe she's looking for a spot to give birth.
Male pronghorn settles in for a nap.
Female pronghorn pauses for her portait, Old Yellowstone Trail
Followed a few moments later by a male pronghorn, hurrying to catch up with her.
Biosn, Lamar Canyon
A bison calf wears mom's tail as a hat.
Grizzly: "I'm hungry for fresh meat." Bison: "Don't even think about it."
In sub-zero temperatures, this bison was lucky to find vegetation in Trout Creek.
Still formidable but bearing the scars of life - damaged horns, an injured eye or maybe a cataract. Near Steamboat Point.
Breakfast time, Hayden Valley
Bison calf ready for afternoon play, Hayden Valley
Heading my way!
Male pronghorn on Yellowstone's northern range
