Anglesey oldest being the Tivyside Hunt in Cardiganshire). Every September the Anglesey Festival of Running takes place. There is a marathon, half-marathon, 10 km and 5 km race, as well as children's contests. Their slogan is "Run the Island". The Anglesey Circuit (Welsh: Trac Môn) is a fully licensed MSA and ACU championship racing circuit, it opened in 1997. The Beaumaris Cricket Club was formed in 1858. Clubs at Holyhead, Amlwch and Llangefni were formed within the following decade, but it was not until the 1880s that the sport became popular outside the upper classes. Bodedern Cricket Club was formed in
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