From CNN.com:
After Babs the gorilla died at age 30, keepers at Brookfield Zoo decided to allow surviving gorillas to mourn the most influential female in their social family.
One by one Tuesday, the gorillas filed into the Tropic World building where Babs’ body lay, arms outstretched. Curator Melinda Pruett Jones called it a “gorilla wake.”
Babs’ 9-year-old daughter, Bana, was the first to approach the body, followed by Babs’ mother, Alpha, 43. Bana sat down, held Babs’ hand and stroked her mother’s stomach. Then she sat down and laid her head on Babs’ arm.