The Loon dollar is part of the same species as ducks. Its flight is laborious because of its weight (4 kg) and its size (a span of 1.50 m), however once in the air, its speed is amazing (90 km / h). He is also very comfortable in the water because he swims without effort, his black beak is therefore formidable for fish. 3. Golden Eagle: 120 km / h Photo credit: Flickr - Bohus Cicel The golden eagle is a bird of prey with great hunting ability, he was once nicknamed "the king of animals" .