Binti Jua (whose name means "Daughter of Sunshine" in Swahili) is the niece of Koko, a gorilla whose linguistic accomplishments have been the subject of several scientific studies.
She also has a son named Bakari with another wild-born silverback, Ramar, who was purchased by Jack Badal as a baby and was trained to do circus stunts.
Binti cradled the child and laid him down when she heard her shift door open to her downstairs enclosure.
In a situation very similar to Binti's, a male gorilla named Jambo, of Jersey Zoo, protected a five-year-old child who had fallen into his enclosure.
Jambo was not trained to care for children and was raised in captivity by his own gorilla mother, so his actions may have involved an instinctive sense that the child needed his help.