We often used the phrase “birdbrain” when we describe a stupid person or a person that has a less intelligence. However, birds are maybe not a less intelligent creatures or not affectionate to show emotions. In this clip, these birds know that one of their own has died and mourn. At first, it’s hard to notice what they are doing. But before the middle of the clip, you will notice the dead corpse of their fellow bird. This is really sad and yet will amaze you. Watch this clip.