Watch: Koko's Tribute to Robin Williams

Koko the gorilla is a resident at the Gorilla Foundation in Woodside, CA and communicates understands spoken English and uses over 1,000 signs to share her feelings and thoughts on daily life. Robin Williams met Koko in 2001. According to Koko's caretaker, it was a very cheerful encounter for both, and Koko has treasured it to this day. "When Koko learned of Robin's passing (on Aug. 11, 2014) she became very sad.
We hope this video will lift her spirits and remind everyone of the profound gift of joy that Robin Williams brought to our world." Source: Article