The term SEA EAGLES can be broken down into two crossword solutions: ERNS (4 letters) and ERNES (5 letters). ERNS is an abbreviation for the common name of the white-tailed sea eagle, a large bird of prey found in parts of Europe, Asia, and Africa. ERNES is an alternative spelling of the same name. The white-tailed sea eagle is a protected species and is known for its impressive wingspan and distinctive call.