A pair of three-month-old baby gorillas have made their debut at the Bronx Zoo after being delivered just 48 hours apart back in January. The Western Lowland Gorillas have been spotted roaming around the zoo's Congo Gorilla Forest exhibit with their mothers Layla and Kumi, who are both 16 years old. Pictured riding around on their mother's backs, or cuddling up in their arms, the duo have been welcomed by the other 17 gorillas in the enclosure, including Ernie, 32, who is father to them both. Scroll down for video . Helping hand: The babies were born to mothers Layla and Kumi on January 17 and 19, but keepers don't know either of their genders yet, and so they haven't been named . Baby steps: Two three-month-old Western Lowland Gorillas have been pictured for the first time at the Bronx Zoo since they were born less than 48 hours apart back in January . Despite being born back in January, keepers at Bronx Zoo have yet to learn either of the babies' genders, and so neither of them have been named yet. But that has not stopped them from winning over crowds at the zoo as they explore their new home. Because of their young age, they are not always on display for visitors, with appearances depending on conditions such as temperature and weather. The eldest of the pair was delivered on January 17 this year, while the younger arrived just 48 hours later, much to the excitement of animal keepers. While they weighed just 4lb at birth, they will eventually grow to weigh more than 400lb as adults. The new babies are joined by two other youngsters who were born earlier in 2014. Fitting in: The two new youngsters join another pair of gorillas that were born earlier in 2014, along with 13 adults in the zoo's Congo Gorilla Forest exhibit . Having a cuddle: While the babies have different mothers, they share a father, 32-year-old Ernie who was nowhere to be seen in these pictures . The Western lowland gorilla is an endangered species in the wild, but while exact numbers are not known because of their remote habitats, they are believed to be more common than mountain gorillas. Lowland gorillas can be distinguished by their slightly brown coat and long arms, and usually live in communities of around 30. The group will be lead by one dominant male, the alpha, sometimes called the silverback because of the shock of silver hair which usually covers his shoulders. Thanks largely to disease and destruction of habitat, the numbers of Western Lowland gorillas living in the wild have dropped by 60 per cent in the last 20 to 25 years, making zoo conservation efforts all the more vital. Surviving: While the Western Lowlands Gorilla is thought to be among the most common gorillas in the wild, they are still an endangered species, making programs like this important to ensure their survival .
Three-month-old Western Lowland Gorillas pictured for first time in exhibit .
Pair were born just 48 hours apart in January to Layla and Kumi, both 16 .
Will join 17 other gorillas, including Ernie, 32, who is father to them both .