An Illinois zoo held an unusual wake yesterday. Gorillas mourned their most influential female after zoo workers euthanized the 30-year-old. Babs had an incurable kidney condition. The Brookfield Zoo decided to let the surviving gorillas mourn Babs after zoo keepers saw a videotape of a gorilla wake at a zoo in Columbus, Ohio. One by one, the gorillas filed into the Tropic World building where Babs' body lay. Her nine-year-old daughter, Bana, was the first to approach the body. She sat down, held her mother's hand and stroked her stomach. Other gorillas approached Babs and gently sniffed the body. A zoo keeper says the display wasn't surprising. The keeper says Babs was the dominant female and "kept things in a harmonious state."