Zoo Atlanta officials have released the cause of death of their 7-year-old giraffe Mona, who suddenly died on Wednesday.
Zoo officials said findings from the necropsy indicate that Mona died from internal bleeding.
A spokesperson for Zoo Atlanta said the giraffes were not on exhibit that day because of wet conditions in their yard.
Mona was in a outdoor corral when she collapsed, according to Dwight Lawson, Ph.D., deputy director of Zoo Atlanta.
"Mona had shown no signs of illness or distress prior to her abrupt collapse," said Lawson.
Officials speculate the fall somehow led to the internal bleeding.
Mona was born Nov. 24, 2005, at Disney's Animal Kingdom.
Mona and her half-sister Glenda, 6, traveled to Atlanta in October 2007 to join the zoo's adult male, Abu, 7.
Mona was the mother of Lily, born July 22, 2011, at Zoo Atlanta.
Officials said Abu, Glenda and Lily are adjusting to the unexpected loss of a member of their herd.
Officials said The University of Georgia Zoo and Exotic Animal Pathology Service will conduct routing histopathological tests over the next eight to 10 weeks to determine if there were any underlying health concerns.
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