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This list of birds of Great Britain comprises all bird species which have been recorded in a wild state in Great Britain. In general the avifauna of Britain is similar to that of Europe, although with fewer breeding species. There are 598 species of birds on the British list as of 7 February 2015, with the latest additions being the alder flycatcher (''Empidonax alnorum'') and Moltoni's warbler (''Sylvia subalpina''). The species order and scientific names used here follow that of the official British list, maintained by the British Ornithologists' Union (BOU). Decisions relating to the British list are published by the British Ornithologists' Union Records Committee (BOURC) in its annual reports in the ''Ibis'', the journal of the BOU. These reports were formerly geographically based and included the whole of the British Isles, but records for the Republic of Ireland and Northern Ireland are now published by their own ornithological associations. Records from the Isle of Man, although adjudicated by the Manx Ornithological Society, continue to be published in the BOU reports. The BOU uses the following categories for British bird species:〔 *A: species which have been recorded in an apparently natural state at least once since 1 January 1950. *B: species which were recorded in an apparently natural state at least once between 1 January 1800 and 31 December 1949, but have not been recorded subsequently. *C: species that, although originally introduced by man, either deliberately or accidentally, have established breeding populations derived from introduced stock, that maintain themselves without necessary recourse to further introduction. Categories A, B and C constitute the Official British List. Birds can be listed in more than one category, for example the Canada goose has a large introduced population, but there have also been a few naturally occurring vagrants, so it meets the criteria for categories A and C. Two further categories are used for record keeping only. *D: species that would otherwise appear in Categories A or B except that there is reasonable doubt that they have ever occurred in a natural state. *E: species that have been recorded as introductions, transportees or escapees from captivity, and whose breeding populations (if any) are thought not to be self-sustaining. Birds in Categories D and E are not on the official British list and are not included here. A sixth category, Category F, is being compiled to include species recorded before 1800 including fossil species.〔(【引用サイトリンク】title= Species categories )〕 Species listed as rare here are those for which a full description is required for acceptance of the record by the British Birds Rarities Committee. Other species have an indication of their breeding and wintering status in Great Britain. Because of its mild winters, Great Britain has a considerable population of wintering species, particularly ducks, geese and swans. There are also a number of species, such as the oystercatcher, that are resident in this island, but migrants elsewhere. Also because of its position, Britain receives a number of vagrants from Asia and North America. Some American gulls, ducks and waders are regular enough not to be considered rare. These include the ring-billed gull, surf scoter and pectoral sandpiper. __NOTOC__ ==Ducks, geese and swans== Order: AnseriformesFamily: Anatidae The swans, ducks and geese are medium to large birds that are adapted to an aquatic existence with webbed feet and bills which are flattened to a greater or lesser extent. In many ducks the male is colourful while the female is dull brown. The diet consists of a variety of animals and plants. The family is well represented in Britain, especially in winter when large numbers visit from Greenland, Scandinavia and Russia. There are about 160 species worldwide with 55 in Britain. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「List of birds of Great Britain」の詳細全文を読む スポンサード リンク
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