In some animals, sibling rivalry turns deadly
In some animal species, competition between siblings can become extreme. It is not just pushing or pecking. One young animal may kill another.Sibling Rivalry in Animals
Black eagle chicks are a harsh example
A black eagle mother lays two eggs, and the first-hatched chick may peck the younger one to death within the first few days. The rivalry begins almost immediately.Sibling Rivalry in Animals
