The term 'Fish-Catching Eagle' is used to describe two species of birds, the ERNE (4 letters) and the Ern (3 letters). The ERNE is a large sea eagle found in Europe, Asia, and North America. It has a wingspan of up to 6 feet and feeds mainly on fish. The Ern is a smaller species of eagle found in Africa and Asia. It has a wingspan of up to 4 feet and also feeds mainly on fish. Both species are powerful predators and have been known to catch fish from the surface of the water.