Had to laugh at the last line

The point of entry, however, still has zoo keepers baffled.

Momo was residing at Kujukushima Zoo and Botanical Garden, Nagasaki, at the time.

The white-handed gibbon was living in a cage with big bars cladded in chicken wire, separating it from the males next door.

Regardless, the 12-year-old gave birth to a black white-handed gibbon in 2021.

Through a DNA test, researchers analysed the poo of four prime candidates to workout who Momo’s sexual pal was.

In the end, the father was a 34-year-old agile gibbon named Itoh.

Jun Yamano, zoo superintendent, told Vice News: “It took us two years to figure it out because we couldn’t get close enough to collect samples – she was very protective of her child.”

Yamano said the point of contact was a hole in the wall with a nine millimetre diameter.

However, zoo keepers had no hard evidence of this.