British Isles naming dispute often rejected in the Republic of Ireland, because some claim its use implies a primacy of British identity over all the islands outside the United Kingdom, including the Irish state, the Crown dependencies of the Isle of Man and Channel Islands that was historically dominating and is currently inaccurate, since Ireland is neither Britain nor British. Many political bodies, including the Irish government, avoid describing Ireland as being part of the British Isles; Éamon de Valera corrected John Gunther when the journalist used the term during a private meeting in the mid-1930s. However, the term "British Isles" has been used
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