This is a list of ants of Great Britain, including endemic and introduced species. Compared with much of the rest of Europe, Great Britain has a smaller number of ants. The size and diversity of ant species in any area is largely determined by the highest summer soil temperature, and this being so, it is not surprising that the greatest concentration of different species is centred in the warmer parts of the country – Dorset, Hampshire, Surrey, the Isle of Wight and Kent being the 5 richest counties, with 33, 31, 29, 27 and 26 different species present respectively.