05/23/2012 04:54 pm ET | Updated May 24, 2012

Baby Bison Born At Brookfield Zoo (PHOTOS, VIDEO)

The Brookfield Zoo family got a little bigger this month--and will get a lot bigger as their newest addition grows.

The Chicago-area zoo welcomed a new female bison calf on May 16, the first birth of the species at Brookfield Zoo since the early 1970s, according to a release.

The as-yet-unnamed calf was born to Leotie, a 3-year-old bison who came to the zoo in 2009 from Wildlife Prairie State Park in Peoria, and Ron, who is 12. She joins a six-bison herd that includes Judy, 12, Becky, 13, Drew, 13, and Lucy, 3.

Baby Bison