The Harpy Eagle

In 100 million years, the Harpy Eagles' surroundings will be a wide Sahara-like landscape. To avoid extinction, the Harpy eagle must adapt to its environment accordingly. The bird will need to be able to locate terrestrially, which will require their legs to be longer and their feet to be larger, and flatter. Due to deforestation and a lack of reason to take flight, the Harpy eagle's keeled sternum will shrivel alongside its wings. Dietary around them will be scarcer, as well as vegetation, thus they will be less particular about their dietary choices forcing their beak to shift to the form of scavenger, and their stomach acid levels to rise. Finally, Their entire physique would shrink, leading them to be the size of an average chicken.