Coastal Flyers is a term used to describe a group of birds that migrate along the coastlines of the world. The two crossword solutions, ERNES and ERNS, are both species of coastal flyers. ERNES stands for the European Robin, a small passerine bird found in Europe, North Africa, and parts of Asia. ERNS stands for the Eurasian Curlew, a large wading bird found in temperate and Arctic regions of Europe and Asia. Both species are known for their long-distance migrations along the coasts of their respective continents.