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  • Staff and volunteers spend weeks preparing for the annual bison roundup at Dunn Ranch Prairie.
  • Bison are moved through holding pens in small groups.
  • Bison are moved into a circular enclosure called a tub. A gate (left) is slowly moved around the tub to herd bison into individual chutes.
  • Bison are moved one at a time into the squeeze chute, which safely holds the bison still while staff administer routine vaccinations and tests.
  • The bison are scanned for an id chip, which gives key information about each animal.
  • After each bison is identified, conservation assistant Hilary Haley (front left) relays key data to the veterinarian and the handlers.
  • Some bison are fitted with tracking collars to learn about their grazing habits and other behaviors. The research is part of a project funded by the Committee for Research and Exploration of the National Geographic Society, researchers from Wildlife Intel, the College of Environmental Science and Forestry, and Washington University in St. Louis.
  • After just a few minutes in the squeeze chute, the bison are released into the corral.
  • The bison are then released back onto the open prairie, where they are benefiting native plants, birds, insects, and other animals.
Dunn Ranch Prairie Bison Round Up
Bison get vaccines and a quick checkup from the vet each year.

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