Twenty-five yearling bison from a herd that's lived in Jefferson County for more than a century are being auctioned off by the city of Denver as part of an annual effort to keep the herd manageable.
The Denver Post reports that 17 bull and eight heifer calves will be auctioned off Friday. Denver collects about $30,000 a year from the auction that helps cover the Genesee Park herd's veterinary and feed costs.
If all 25 bison are sold this year, it will put the city's herd at about 60 animals. The city sold 30 yearlings at last year's auction.
The bison have been part of the city's mountain-park landscape since 1914, when they were acquired from Yellowstone National Park.
Denver has held auctions for the bison for 40 years.