At 5:40 a.m. on Christmas Eve, the Potter Park Zoo in Michigan welcomed a rare black rhinoceros to its brood — and the baby boy is already a big hit on social media.

“For the first time in our 100 year history, a black rhino calf has been born at Potter Park Zoo!” the Lansing, Mich., venue tweeted Tuesday with a video — since gone viral — of the birth.

The baby is 12-year-old rhino Doppsee’s first, and Potter Park had been excitedly anticipating her delivery.

“We’re on #BabyRhinoWatch,” the zoo, which touts itself as Michigan’s oldest, tweeted earlier this month. “Doppsee seems to be doing well and zoo staff are keeping a close eye on her.”

The still-unnamed baby rhino and his mom had a great Christmas, zoo officials announced in a press release. “Mother and calf are bonding behind the scenes in the rhino barn,” they write, noting that the pair will not make a public appearance until the spring of 2020.

Twitter and Instagram posts quickly filled up with thousands of comments praising Doppsee for being “such a good mama,” and offering congratulations to the zoo and the new mother.

Doppsee’s birth is a major cause for celebration as black rhinos “are being pushed to the brink of extinction by illegal poaching and loss of habitat,” writes the zoo. Current estimates count only 5,000 black rhinos left in the wild.

A Malawi national park recently released 17 black rhinos as part of conservation efforts to save the endangered species.

Other notable rhinoceros births this year have included a one-horned rhino born via artificial insemination at Zoo Miami and the first birth of a southern white rhino in North America, which was named Future, earlier this month. This year, scientists also created and transferred rhino embryos in an ongoing effort to save the species from extinction.