Osprey have amazing vision. Researches have studied their vision when they fish. Osprey have been measured to be anywhere between 5-40 meters above the water before performing a spectacular dive on their pray below. In some parts of the world, Senegal for example, it’s been noted that Ospreys will circle 100-300 meters above the water.
Unlike most birds, loons have solid bones that make them less buoyant and better at diving. They can quickly blow air out of their lungs and flatten their feathers to expel air within their plumage, so they can dive quickly and swim fast underwater. Once below the surface, the loon’s heart slows down to conserve