A western gorilla, known as an endangered species, has given birth to a baby at a Tokyo zoo, its operator said Tuesday.

Momoko, 34, delivered her baby on Monday morning, Ueno Zoological Gardens said, adding the mother and the baby are in good health. The newborn's sex remains unknown.

(Tokyo Zoological Park Society)

She delivered her fifth baby while being observed by the infant's father Haoko, 24, and other female gorillas.

After giving birth, Momoko soon hugged the baby and started licking it. The mother was also seen feeding the infant, the zoo said.

There are currently eight gorillas in the facility, including Momoko and the baby.