Mongan Bog is a

peat Peat is an accumulation of partially Decomposition, decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, Moorland, moors, or muskegs. ''Sphagnum'' moss, also called peat moss, is one of the most ...

bog A bog or bogland is a wetland that accumulates peat as a deposit of dead plant materials often mosses, typically sphagnum moss. It is one of the four main types of wetlands. Other names for bogs include mire, mosses, quagmire, and musk ...

County Offaly County Offaly (; ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is part of the Eastern and Midland Region and the Provinces of Ireland, province of Leinster. It is named after the Ancient Ireland, ancient Kingdom of Uí ...

Ireland Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelan ...

. The bog is located east of

Clonmacnoise Clonmacnoise or Clonmacnois (Irish language, Irish: ''Cluain Mhic Nóis'') is a ruined monastery in County Offaly in Republic of Ireland, Ireland on the River Shannon south of Athlone, founded in 544 by Saint Ciarán of Clonmacnoise, Ciarán, ...

, a monastic site on the

river Shannon The River Shannon ( or archaic ') is the major river on the island of Ireland, and at in length, is the longest river in the British Isles. It drains the Shannon River Basin, which has an area of , – approximately one fifth of the area of I ...

. A

nature reserve A nature reserve (also known as a wildlife refuge, wildlife sanctuary, biosphere reserve or bioreserve, natural or nature preserve, or nature conservation area) is a protected area of importance for flora, fauna, funga, or features of geologic ...

covering about 120 ha protects part of the bog.

Protection designations

As a

raised bog Raised bogs, also called ombrotrophic bogs, are acidic, wet habitats that are poor in mineral salts and are home to flora and fauna that can cope with such extreme conditions. Raised bogs, unlike fens, are exclusively fed by precipitation (ombro ...

of ecological interest, it was designated a

Special Area of Conservation A special area of conservation (SAC) is defined in the European Union's Habitats Directive (92/43/EEC), also known as the ''Directive on the Conservation of Natural Habitats and of Wild Fauna and Flora''. They are to protect the 220 habitats and ap ...

(covering 207 ha) in 2017. A larger area is protected for its birdlife as a

Special Protection Area A special protection area (SPA) is a designation under the European Union Directive on the Conservation of Wild Birds. Under the Directive, Member States of the European Union (EU) have a duty to safeguard the habitats of migratory birds and cer ...

(SPA): Mongan Bog SPA covers 1,843 ha and is also an

Important Bird Area An Important Bird and Biodiversity Area (IBA) is an area identified using an internationally agreed set of criteria as being globally important for the conservation of bird populations. IBA was developed and sites are identified by BirdLife Int ...

. This site was formerly important for wintering Greenland white-fronted geese ''Anser albifrons flavirostris''.

History

The bog began to form around 9,000 years ago between two

esker An esker, eskar, eschar, or os, sometimes called an ''asar'', ''osar'', or ''serpent kame'', is a long, winding ridge of stratified sand and gravel, examples of which occur in glaciated and formerly glaciated regions of Europe and North Amer ...

s. The bog remained relatively intact for most of its history, but during the 1970s machines were used to drain parts of the

, which drastically shrunk it. This sparked the preservation movement that has led to the preservation of many bogs throughout Ireland. In the current decade, Mongan is the largest bog in the area.

Access

The nature reserve belongs to

An Taisce An Taisce – The National Trust for Ireland (; "An Taisce" meaning "the store" or "the treasury"), established on a provisional basis in September 1946, and incorporated as a company based on an “association not for profit” in June 1948, is ...

, an organisation which preserves examples of Ireland's built and natural heritage. The nature reserve is open by appointment for research.

References

Bogs of the Republic of Ireland Important Bird Areas of the Republic of Ireland Landforms of County Offaly Natural Heritage Areas of the Republic of Ireland Nature reserves in the Republic of Ireland Protected areas of County Offaly Special Areas of Conservation in Ireland {{Offaly-geo-stub