A pack of Silverback Mountain gorillas in Uganda were caught for the first time on camera performing a supper serenade. Filmmakers captured the unique ritual by placing a robotic'spy' that resembles a young gorilla deep in the jungle. The team designed the animatronic machine with realistic eye movements, as wild gorillas communicate with each other through eye contact, and a submissive demeanor with the hopes it would be accepted by the pack. Along with the singing, the footage shows the gorillas screamed a'chorus of appreciation' while eating and provided evidence that they are extremely gassy. A pack of Silverback Mountain gorillas in Uganda were caught for the first time on camera performing a supper serenade.