Triskelion a Triskele composed of three sevens as its symbol in place of the Nazi Swastika. The Flag of the Isle of Man bears 3 legs based on the Triskele. The crest of the Breton football club En Avant de Guingamp combines the Flag of Brittany, the team colours and the triple spiral triskelion. "The Gamesters of Triskelion" is a second-season episode of the American science fiction television series "Star Trek". In the Marvel Universe, the intelligence agency S.H.I.E.L.D. uses the Triskelion as its headquarters . The Triskele is also used as a prominent symbol in MTV's "Teen Wolf (2011 TV
Introduced species of the British Isles are susceptible. The grey squirrel is a carrier of the squirrel pox virus which kills red squirrels but not grey squirrels. The European crayfish is susceptible to crayfish plague which is spread by the introduced signal crayfish. Unlike some other environmental problems such as pollution, the effect of an introduced species is not a single event. Once a species has been introduced to an island, the problems may persist and escalate as the species spreads further. Coypus "(Myocastor coypus)", large semi-aquatic rodents native to South America, were introduced to the British Isles in 1929 when fur farms were set up