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Havergate Island is the only island in the county of Suffolk, England.〔 (【引用サイトリンク】title=Wildlife Walks, Havergate Island, Orford )〕 It is found at the confluence of the River Ore and the Butley River near the village of Orford. It is a marshy nature reserve run by the Royal Society for the Protection of Birds (RSPB) and is known for its population of avocets and terns. It is part of the ecologically important Alde-Ore Estuary and has protected conservation status as part of a national nature reserve, SSSI, SAC, SPA, Ramsar Site and is also a part of the Suffolk Coast and Heaths AONB. The island, which is long and across at its widest point and covers , lies in the Alder and Ore estuary and is protected from the North Sea by the shingle spit of Orford Ness. It is bounded by the river channels known locally as ''The Gull'', ''Lower Gull'' and ''The Narrows''.〔 〕 == Ecology == Havergate Island comprises six salt water lagoons covering 60 hectares, surrounded by earthen banks. There are also 40 hectares of salt marsh and four hectares of vegetated shingle.〔 〕 There are also areas of grazing marsh and mud flats, and the site provides important habitat for rare gulls, wading birds and other species.〔 (【引用サイトリンク】title=Havergate Island - Our work here )〕 The island is an important breeding, roosting and feeding site for many migratory and resident bird species. The UK's largest breeding population of pied avocets and Suffolk's only breeding Sandwich terns can be found there.〔〔 (【引用サイトリンク】title= SSSI Citation - Site: Alde-Ore Estuary )〕 Other birds found on the island include oystercatchers, redshanks, ringed plovers, golden plover, dunlin, greenshank and turnstones〔 as well wigeon, pintail and wheatears.〔 (【引用サイトリンク】title=RSPB Havergate Island )〕 The lagoons and marshes make it an important roosting and feeding site . Birds of prey including short-eared owls and marsh harriers have also been seen hunting over the island. Mammals on the island include mice, voles and a stable population of around 29 hares. Common seals have also been spotted in the river around the island. Butterfly species commonly found on the island include skippers, small coppers, walls, meadow browns and gatekeepers.〔 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「Havergate Island」の詳細全文を読む スポンサード リンク
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