Shortly afterward, they announced the tragic loss.

"We are heartbroken to announce that Nasha's calf died shortly after our birth announcement earlier today after the calf was accidentally stepped on by her mother," the zoo wrote.

"Our animal care team quickly intervened but were unsuccessful at saving the calf," the zoo wrote.

"An initial necropsy showed trauma to the neck but further testing will follow to determine if there were any underlying causes for the newborn's death.

Thank you all for your support over the past few weeks and especially during this tough time."

"We are devastated over the loss of Nasha's calf," said Dr.