Detroit Zoo Reveals 5-Month-Old Baby Wallaby Is Missing: 'We Are Heartbroken'

missing wallaby joey at the Detroit Zoo
missing wallaby joey at the Detroit Zoo

Detroit Zoo

A 5-month-old wallaby has gone missing at the Detroit Zoo.

The Michigan zoo shared the sad news on Facebook Sunday. "We are heartbroken," the facility wrote about the baby animal's disappearance.

In the post, the Detroit Zoo revealed that the wallaby joey was last seen by staff on Saturday around 5 p.m. at the Australian Outback Adventure habitat before the animal went missing on Sunday morning.

"Immediately, animal care staff began searching for the little one," the Detroit Zoo explained on Facebook. "Zoo staff is carefully examining the habitat and areas around it while also reviewing trail cameras and surveillance cameras all over the Zoo."

"At his or her age, the joey is just beginning the process of independence by spending time outside the pouch, but still nursing and spending time in the pouch," the post continued. "It is unlikely that the young wallaby can survive an extended amount of time away from the mother. We are reviewing every potential scenario and remain hopeful this joey will be found unharmed."

Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.

missing wallaby joey at the Detroit Zoo
missing wallaby joey at the Detroit Zoo

Detroit Zoo

RELATED: Two Curious Wallaby Joeys Pop Out of Their Moms' Pouches for the First Time at English Zoo

The Michigan zoo first announced the arrival of the wallaby on Friday, sharing photos of the animal with its mother on social media.

"There's a new bundle of joy at the Detroit Zoo! We're so excited to share that 4-year-old red-necked wallaby Sprocket has given birth to her first joey," zookeepers announced. "The little one, estimated to be between 5 and 6 months old, is just starting to leave mom's pouch for seconds at a time! Wallaby joeys can stay in their mothers' pouches up to eight months after gestation."

"The animal care team is happy to report the new joey is healthy and well cared for. In the coming weeks and months, they'll be able to find out if this new addition is a boy or a girl," the zoo added.

Along with Sprocket and the missing joey, the zoo is also home to two other red-necked wallabies, a female named Eloise and her joey named Bucky, born in October 2020.