• A bull elk bugling in the Upper Beaver Meadows region of Rocky Mountain National Park.
  • A pika on Mount Evans.
  • A red fox outside her den near Boulder, Colorado.
  • A black bear near Boulder, Colorado.
  • A hummingbird near Golden, Colorado.
  • A pine marten near Chasm Lake in Rocky Mountain National Park.
  • Yellow-bellied marmot near Boulder, Colorado.
  • A bull bison in Custer State Park, South Dakota.
  • A pronghorn in Custer State Park, South Dakota.
  • A mountain goat on the slopes of Mount Evans.