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Adorable video shows Koko the gorilla bonding with her adopted kittens

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Koko the gorilla, known for communicating through a modified version of sign language, adopted two kittens on her 44th birthday.

On July 4, Koko's trainer brought a litter of kittens for Koko to play with, according to Kokoflix YouTube channel. While playing with the kittens, the gorilla and two of the kittens, Ms. Gary and Ms. Black, got along so well that her trainer knew the three had to be together. Koko adopted the two kittens. She treats them as if they are her babies.

Koko has owned multiple kittens throughout the years, nurturing them as if they were her own babies. She adopted her first kitten in 1984, also on her birthday. The gorilla has always loved babies but has never been able to have one of her own.

A video of Koko and the kittens' first meeting was posted on YouTube on Tuesday.