Anglesey who could speak Welsh are as follows: Today, Welsh is less widely used on the island, but it is still the dominant language in certain areas, particularly in the centre, including the town of Llangefni, and some areas of the south coast. A notable example is the village of Llanfairpwll. The island's five secondary schools vary widely in the percentage of their pupils who come from predominantly Welsh-speaking homes, as do the percentages who can speak Welsh: The geology of Anglesey is notably complex and is frequently used for geology field trips by schools and colleges. Younger strata in Anglesey
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