A 36-year-old silverback gorilla at the Cheyenne Mountain Zoo has died.
"Scotty" was found dead in his exhibit this morning.
Zoo Doctors say he died in his sleep.
The 330-pound gorilla was born in the wild in 1969 and was on loan to the Cheyenne Mountain Zoo for the past five years.
Officials say he was a favorite among visitors.
Doctors say they believe Scotty died as a result from the effects of a ruptured aorta.