Koko is recognised as being one of the smartest gorillas on the planet, using sign language to communicate with humans.
Koko continued to overhear calls regarding Williams’ death and eventually, the gorilla began to realise that she would have to accept the loss of a very special friend. Half an hour later, Koko expressed herself using the sign language signals for ‘woman’ and ‘crying.’
“At the end of the day, Koko became very somber, with her head bowed and her lip quivering,” read a further excerpt from the press release.