Hidden camera traps capture wildlife in Wyoming

An ecologist uses a scientific tool for artistic purposes.

  • A red fox inspects the snow-covered scraps left over from a cougar kill.

    Jonny Armstrong
  • A long exposure of a bobcat in the Vedauwoo area in Wyoming, which is popular for rock climbing during daytime hours.

    Jonny Armstrong
  • A mountain lion feeds on the frozen carcass of a mule deer that it killed and cached the day before.

    Jonny Armstrong
  • A Wyoming ground squirrel scans the horizon after a spring thunderstorm.

    Jonny Armstrong
  • A camera set for mountain lions is triggered by an unexpected visitor, a long-eared owl. In the background, streaks of light show planes headed for Denver International Airport above the glow of sprawling suburbs.

    Jonny Armstrong
  • A grizzly bear scratches its back on a tree in Bristol Bay, Alaska.

    Jonny Armstrong
  • A young-of-the-year American marten inspects a camera in a stand of lodgepole pine.

    Jonny Armstrong
  • Cottontail rabbits are a frequent “bycatch” of camera traps meant for carnivores.

    Jonny Armstrong
  • A mule deer seeks refuge from deep snow on a windswept ridgeline, tripping the camera just after dawn.

    Jonny Armstrong
  • The hardest part about trapping on public lands during summer — curious cows damage gear and trigger cameras until their batteries die.

    Jonny Armstrong