Happy birthday, Juba!
At the time of his birth last year, zoo officials wrote: "...his birth is truly a rare event as he is the first eastern black rhinoceros calf born in North America since January 2011." Black rhinos, by the way, are critically endangered. There are fewer than 100 in North American zoos.
Juba, which means "brave" in Swahili, was the winning entry out of 9,000 possible names entered into a contest at the zoo last year.