Harpy Eagles of the Future

A harpy eagle is a staple of the rainforest. I'm trying to answer the question of what it will look like in a few millennia. I predict that its diet and food intake will be different due to climate change. The harpy eagle lives near the coasts of South America, and in a few millennia it will be flooded due to climate change therefore its diet will be things like seafood. This will affect its body which will get smaller and its beak will get bigger to catch fish, its feathers will get lighter to stay cooler. Also its wings will get longer to fly more distances over water and it will also have to get two more claws to hold onto rocks. It will also have leather on the bottom of its claws to grip onto rocks better. That's what I think will happen to the harpy eagle.