"Circe has been a very protective mother and the calf has been nursing regularly," the zoo wrote of the mother-son rhino pair

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Side profile of baby rhino walking through grass
Credit: Dave Pusey / Shutterstock

This Florida zoo has something exciting to celebrate!

On Thursday, Zoo Miami announced that on Feb. 24, their 21-year-old endangered black rhinoceros named Circe welcomed her fourth child—a male calf.

"Mother and calf have remained off exhibit since the birth where they have been kept sheltered from external stresses and given time to properly bond," the zoo wrote on Facebook. "During that time, Circe has been a very protective mother, and the calf has been nursing regularly while growing rapidly and gaining strength for his public debut!" 

And starting this week, the mother-son rhino pair "are being slowly introduced to the public," and will spend short amounts of time outside every day. 

Circe, who was born at South Carolina's Riverbanks Zoo, came to Zoo Miami on a breeding loan with the Los Angeles Zoo.

She shares the calf with a 21-year-old endangered black rhino named Eddie, who came to the Florida zoo in 2006. To date, he has sired three offspring with Circe.

Over the years, Zoo Miami has welcomed 13 black rhino calves, making it one of the country's most successful zoo rhino breeding programs. 

Although there were over 100,000 black rhinos at the start of the 20th century, there are now less than 5,000 left in the wild, according to the zoo, which noted the danger the animals face from poachers due to their horns. 

The species, which can typically be found in Eastern and Southern Africa, lead solitary lives and can be known to weigh up to 3,000 lbs.

This story originally appeared on people.com