The Tallgrass Prairie National Preserve in east-central Kansas is conducting its first roundup of its growing bison herd.

A herd of 13 bison was brought from Wind Cave National Park in South Dakota to the Chase County preserve in 2009. Since then, the original herd of 13 has grown to 25 after several successful calving seasons.

They recently were tagged, weighed, given a series of vaccinations and had blood drawn for testing.

Plans call for the herd to ultimately grow to 75 to 100 animals. As it grows, officials with the National Park Service and with The Nature Conservancy will be watching to see how the prairie changes as the dominant native species of the plains is reintroduced to the grasslands.

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Associated Press information from: Lawrence Journal-World