A recent discovery shows that gorillas sing and hum when eating. Singing seems to be a way for gorillas to express contentment with their meal, as well as for the head of the family to communicate to others that it is dinner time. Food-related calls have been documented in many animals, including chimpanzees and bonobos, but aside from anecdotal reports from zoos, there was no evidence of it in gorillas.
To see if they make these noises in the wild, Eva Luef, a primatologist at the Max Planck Institute for Ornithology in Seewiesen, Germany, observed two groups of wild western lowland gorillas in the Republic of the Congo. She identified two different types of sound that the gorillas sometimes made when eating. One of them was humming – a steady low-frequency tone that sounds a bit like a sigh of contentment and the other was singing – a series of short, differently pitched notes that sounds a little like someone humming a random melody.
https://www.newscientist.com/articl...mpose-happy-songs-that-they-hum-during-meals/
To see if they make these noises in the wild, Eva Luef, a primatologist at the Max Planck Institute for Ornithology in Seewiesen, Germany, observed two groups of wild western lowland gorillas in the Republic of the Congo. She identified two different types of sound that the gorillas sometimes made when eating. One of them was humming – a steady low-frequency tone that sounds a bit like a sigh of contentment and the other was singing – a series of short, differently pitched notes that sounds a little like someone humming a random melody.
https://www.newscientist.com/articl...mpose-happy-songs-that-they-hum-during-meals/