Anglesey Sqn Search and Rescue Helicopters, both units providing employment for about 500 civilians. RAF Valley is now the headquarters of 22 Sqn Search and Rescue. There is a wide range of smaller industries, mostly located in industrial and business parks, especially at Llangefni and Gaerwen. These include an abattoir and fine chemical manufacturing, as well as factories for timber production, aluminium smelting, fish farming and food processing. The island is also on one of the major routes from Britain to Ireland, via ferries from Holyhead, off the west of Anglesey on Holy Island, serving Dún Laoghaire and Dublin Port. Much
Anglesey at Mona is a nesting site for skylarks. The sheer cliff faces at South Stack near Holyhead provide nesting sites for huge numbers of auks including puffins, razorbills and guillemots together with choughs and peregrine falcons. Three sites on Anglesey are important for breeding terns – see Anglesey tern colonies. There are significant occurrences of the "Juncus subnodulosus"-"Cirsium palustre" fen-meadow plant association, a habitat characterised by certain hydrophilic grasses, sedges and forbs. Anglesey is home to several species of tern, including the roseate tern. Anglesey is home to two of the UK's few remaining colonies of red squirrels, at Pentraeth