Terror Eagle

Terror eagle is a future descendant of a golden eagle that survived and evolved into larger predators due to abundance of food sources. They are now the largest species of eagle on Earth since the time when Haast's eagles of New Zealand were alive, and are also about the same size as a Haast's eagle. They are predators that feed on animals from the size of a Gambian pouched rat to the size of an extinct moa. They are able to compete with its mammalian rivals like predator dylanuses and others.

Evolution
After the Late Holocene ended, humans are now gone, and golden eagles have managed to survive the overslaughter by humans. Golden eagles eventually grew much bigger due to abundance of food. These groups of golden eagles in the future have evolved into the terror eagles.