page_title: List of islands of County Mayo
section_title: Biodiversity
hierarchical_section_title: List of islands of County Mayo / Biodiversity
caption_attribution_description: Schwarze Krähenbeere im Schwarzen Moor in der Rhön, Germany Azərbaycanca=Empetrum nigrum Català=Empetrum nigrum Česky=Šicha černá Dansk=Almindelig Revling English=Empetrum nigrum Español=Empetrum nigrum Suomi=Variksenmarja Français=Empetrum nigrum Iñupiak=Paunġaq 日本語=ガンコウラン 한국어=시로미 Перем Коми=Пончӧд Коми=Пончӧд Lietuvių=Juodoji varnauogė Nederlands=Kraaihei Norsk nynorsk=Krekling Norsk bokmål=Krekling Polski=Bażyna czarna Sámegiella=Čáhppesmuorji Seeltersk=Heedebäie (Empetrum) Svenska=Kråkbär Türkçe=Empetrum nigrum Tiếng Việt=Empetrum nigrum 中文=岩高兰
context_page_description: This articles lists the islands of County Mayo, the mainland of which is part of the island of Ireland. Included in this list are named offshore and freshwater islands as recorded by Ordnance Survey Ireland or the Placenames Database of Ireland. Additionally, areas of ecological significance related to both offshore and freshwater islands, designated by the National Parks and Wildlife Service, are also listed.
  Although County Mayo has hundreds of offshore and freshwater islands, only a handful of islands and island groups are large enough to be distinguishable on a typical map of the county, namely Achill Island, Clare Island and Inishturk, along with the island clusters of Duvillaun, Inishkea, Clew Bay and the major loughs. There are over 100 islands which are greater than 10 acres in area. The largest island is Achill, which extends to 148 km², making it Ireland's largest offshore island.
  Due to its abundance of bays, inlets and offshore islands, Mayo has the longest coastline of any county in Ireland, at 1,168 km or approximately 21% of the total coastline of the State. The geology and geomorphology of the county and its islands is among the most varied and complex in Ireland.
context_section_description: Many of the county's offshore and freshwater islands are designated as areas of ecological significance and are protected both at national and European level. Mayo's offshore islands are a haven for wildlife and biodiversity, supporting hundreds of species of bird, fish and marine mammal, as well as unique vegetation. Five of the county's major inland lakes (along with their islands) are also protected, those being Lough Mask, Lough Conn, Lough Cullin, Lough Carra and Carrowmore Lake.
  The biodiversity of the islands is protected under the following designations. There is overlap across designations, as different designations apply to different species, eg. the Duvillaun Islands are an SAC, SPA and proposed NHA. 
  Special Area of Conservation (SAC) - These are prime wildlife conservation areas in the country, considered to be important on a European as well as Irish level.
  Special Protection Area (SPA) - Classified under the EU Birds Directive for the protection of endangered species of wild birds.
  Natural Heritage Area (NHA) - This is an area considered important for the habitats present or which holds species of plants and animals whose habitat needs protection.
  The following areas of ecological significance are located either on or adjacent to County Mayo's offshore islands. The five major inland lakes listed as SPAs are also included, and are shown in italics in the list below.
caption: Black crowberry (Empetrum nigrum)
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