LOUISVILLE, Ky. (WDRB) -- A male white rhino is the newest  resident of the Louisville Zoo. 

Zoo officials say 3-year-old Letterman was named for the late night host by famed zookeeper Jack Hanna, after the rhinoceros was born at The Wilds in southeast Ohio. 

Now that Letterman has completed his 30-day quarantine, he will soon move into an exhibit with 34-year-old female white rhino Sindi. The pair will be monitored for any aggressive "sparring," which zoo officials say is normal. But his is not on exhibit quite yet. 

The white rhinoceros is the second largest land mammal -- second only to an elephant. In the wild in Africa, they can grow to an average of 4,000 to 6,000 pounds.  

White rhinos are considered a threatened species. While they have no natural predators, poachers are a threat because of illegal demand for the rhino horns. 

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