The term 'shore flier' refers to three different types of birds: an ERN (3 letters), an ERNE (4 letters), and a TERN (4 letters). The ERN is a small wading bird with a long, curved bill, typically found in wetlands. The ERNE is a large, long-winged seabird that breeds near freshwater lakes and coasts. The TERN is a medium-sized seabird with a forked tail, typically found near coasts and rivers. All three species are known for their graceful, swift flight over water.