Buffalo herds on the Great Plains are one of the iconic pictures of the Wild West.Cowboys and park staff have been hosting the Custer State Park Buffalo Roundup as they gather the 1,500-strong herd of buffalo and force them into corrals.
The dust flies and the ground trembles as the biggest herd of buffalo in the US is rounded up and driven past by cowboys on horseback.
The buffalo are rounded up yearly to prepare them for the autumn buffalo sales, which normally take place on the third Saturday in November.
After the round-up, spectators can watch the herd being identified and the calves being vaccinated.
Some of the buffalo are sold off every year as there is only enough winter meadow (when the herd is left to fend for itself) to feed around 1,500.
