April 30th 1980 / May 22nd 1986: Lincoln Park Zoo May 22nd 1986 / August 9th 1991: Saint Louis Zoological Park August 9th 1991 / February 21st 2002: Topeka Zoological Park February 21st 2002 / September 25th 2002: Lincoln Park Zoo September 25th 2002 / May 19th 2004: Louisville Zoological Garden May 19th 2004 / May 10th 2012: Lincoln Park Zoo May 10th 2012 / now: Brookfield Zoo