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Alternatively species can also be native when they have flown or swum to Britain as is the case with many bird species which arrived after the submersion of the land bridge, a recent example is the collared dove which arrived in the 1950s, this also applies for plants which spread seed in the wind.
A list of Pteridophyta, Gymnospermae and Angiospermae including all the native plants and established aliens known to occur in Ireland with the distribution of each species, and recommended Irish and English names. pp. [i]-xxvii, 1-171, map. Dublin: Stationery Office.
The WGSRPD does not include the Channel Islands under Great Britain, but rather as a subcategory of Category:Flora of France. Taxa of the lowest rank are always included. Higher taxa are included only if endemic. Great Britain is included within the WGSRPD region of Northern Europe, in Category:Flora of Northern Europe.
The East Aegean Islands, politically part of Greece, are part of the region of Western Asia, rather than the botanical continent of Europe.. Native taxa of the lowest rank are included if they occur widely in the botanical continent, otherwise they should be included in the flora of one or more of the constituent regions.
The islands provide a natural flyway for migrating landbirds to and from their Arctic breeding grounds and a refuge for windblown vagrants from America and northern Europe. Many species of bird breed in the Western Isles and the surrounding islands, including, most of Britain's corncrakes which breed on the croftlands of all the islands. [1]
The cuckoo flower (Cardamine pratensis), a herbaceous perennial, can be found throughout Wales. Bog rosemary ( Andromeda polifolia ), a small flowering shrub , can be found in central Wales. Within the British Isles, the Snowdon lily ( Gagea serotina ) is found only on the slopes of Snowdon .
The flora of Scotland is an assemblage of native plant species including over 1,600 vascular plants, more than 1,500 lichens and nearly 1,000 bryophytes.The total number of vascular species is low by world standards but lichens and bryophytes are abundant and the latter form a population of global importance.
Jersey fern (Anogramma leptophylla) is present in the Channel Islands as a native species, but does not occur in Britain or Ireland. Irish spleenwort ( Asplenium onopteris ) is native only to Ireland; it is represented in Britain only by an introduced population in North Wales.