White-tailed eagles, also known as erns (4 letters) and erne (5 letters), are large birds of prey native to the Northern Hemisphere. They are the largest species of eagle in North America and Europe, with a wingspan of up to 8 feet. They have a distinctive white tail and a dark brown body, and they feed mainly on fish. White-tailed eagles are powerful predators and can be found near large bodies of water, such as lakes and rivers. They are also known to scavenge for food, and their population is increasing due to conservation efforts.