British Isles - Flora and Fauna

Flora and Fauna

See also: Fauna of Great Britain, Fauna of Ireland, and Trees of Britain and Ireland

The islands enjoy a mild climate and varied soils, giving rise to a diverse pattern of vegetation. Animal and plant life in the archipelago is similar to that of the northwestern European continent. However, there are few numbers of species with Ireland having even less. All native flora and fauna in Ireland, for example, is made up of species that migrated from the elsewhere in Europe, and Great Britain in particular. However, the only window during which this could occur was between the end of the last Ice Age (about 12,000 years ago) and when the land bridge connecting the two islands was flooded by sea (about 8,000 years ago).

As with most of Europe, prehistoric Britain and Ireland were covered with forest and swamp. Clearing began around 6000 BC and accelerated in medieval times. Despite this, Britain retained its primeval forests longer than most of the mainland due to a small population and later development of trade and industry and wood shortages were not a problem until the 17th century. By the 18th century, most of Britain's forests were consumed for shipbuilding or manufacturing charcoal and the nation was forced to import lumber from Scandinavia, North America, and the Baltic. Most forest land in Ireland are maintained by state forestation programmes. Almost all land outside of urban areas is farmland. However, relatively large areas of forest remain in east and north Scotland and in southeast England. Oak, elm, ash and beech are amongst the most common trees in England. In Scotland, pine and birch are most common. Natural forests in Ireland are mainly oak, ash, wych elm, birch and pine. Beech and lime, though not native to Ireland, are also common there. Farmland hosts a variety of semi-natural vegetation of grasses and flowering plants. Woods, hedgerows, mountain slopes and marshes host heather, wild grasses, gorse and bracken.

Larger animals, such as wolf, bear and reindeer are today extinct. However, some species such as red deer are protected. Other small mammals, such as rabbits, foxes, badgers, hares, hedgehogs, and stoats, are very common. Wild boars have also been reintroduced to parts of southern England, following escapes from boar farms and illegal releases. Many rivers contain otters and seals are common on coasts. Over 200 species of bird reside permanently on the islands and another 200 migrate to them. Common types are the Common Chaffinch, Common Blackbird, House Sparrow and Common Starling, all small birds. Large birds are declining in number, except for those kept for game such as pheasant, partridge, and Red Grouse. Fish are abundant in the rivers and lakes of the islands, in particular salmon, trout, perch and pike. Dogfish, cod, sole, pollock and bass are among the sea fish as well as mussels, crab and oysters on the coastline. There are more than 21,000 species of insects found on the islands.

Neither Great Britain nor Ireland are inhabited by many reptiles or amphibians. Only three snakes are native to Great Britain: the common European adder, the grass snake and the smooth snake; none are native to Ireland. In general, Great Britain has slightly more variation and native wild life, with weasels, polecats, wildcats, most shrews, moles, the water voles, roe deer and common toads also being absent in Ireland. This patterns in true also for birds and insects. However, notable reversals of this theme include the Kerry slug and certain species of wood lice, which are native to Ireland but not found on Great Britain.

Domestic animals native to the islands include the Connemara pony, Shetland pony, Irish wolfhound and several types of cattle and sheep.