Elephants are well-known for their strong social bonds. They have been observed to produce mournful sounds and shed tears when experiencing loss or stress

Gorillas are the second closest living relatives to humans. When a member of their troop dies, they have been observed to sit quietly next to the body

Dolphins produce a series of sounds that can resemble crying, especially when they are separated from their pod or in distress

Dogs, often considered man's loyal companions, express sadness through whining, whimpering or even shedding tears

Cows have been observed shedding tears, especially when separated from the calves

Whales are highly social and emotional creatures. When a whale dies, others in the pod have been observed to stay with the body

Chimpanzees are the closest living relatives to humans. They show grief and mourn when they lose someone. They might refuse to eat and sit in mourning with the body

Wolves are extremely loyal to their pack. When someone from their pack dies, they have been observed to show visible signs of mourning by howling mournfully