This reminds me of a documentary I saw where a mourning dolphin held her dead calf at the water surface with her snout for hours on end. It was really moving footage..As was already said, anyone who was ever owned a cat or a dog knows what this means. When I moved away from home, my parents told me how often my cat would sit on my bed and await my return.. That too was her mourning my disappearance. It's surprising how underestimated the grief of animals still is, even though we find it in our own homes.