He was a Western lowland gorilla — a subspecies of the great apes found in Africa and listed as critically endangered — and because of his mature age he was a silverback, after the gray hair ...

For the third time in 13 months, the Pittsburgh Zoo & Aquarium has suffered the loss of a beloved western lowland silverback gorilla. Harry, a 33-year-old male, died March 25 after suffering a “ ...

Zoo staff said Roxie will be remembered for chasing the baby gorillas around and being helpful in bringing offspring closer to the troop by teaching Goma, a silverback gorilla, his place in the group.