A deer fawn weighs about 30 pounds, which is the heaviest animal that a typical eagle can lift. Some species of eagles, like the Harpy Eagle, can lift monkeys, which weigh about 15-20 pounds. Squirrels weigh about 2 pounds, and they are a common prey item for eagles. Rabbits weigh about 4 pounds, and they are also a common prey item for eagles. Eagles can also lift fish, which can weigh up to 10 pounds.