In June 2011, two eastern black rhinoceros, "Jello" and "Dopsee", arrived at the zoo in preparation for the new exhibit's opening in October. On December 24, 2019, the zoo welcomed the birth a rare baby Rhino at 5:40 am. The baby male rhino is named Jaali, pronounced "Jolly". Three female Amur tiger cubs were born in September, increasing the zoo's tiger population to five. The zoo's 22-year-old African lion, "Amboseli" – one of the oldest lions in captivity worldwide – died in December. Two new female lions arrived at the zoo to join the zoo's existing male lion, "Dakota". In April 2012, a critically endangered eastern bongo was born at Potter Park, increasing the number at the zoo to four. In the spring of 2013, the zoo's aging coral reef exhibit was removed to be replaced with an additional classroom, and three river otter pups were added to the zoo, bringing the population to five. Two of the pups were orphans moved from the Alexandria Zoo in Louisiana.