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Special Areas of Conservation

Halkyn Mountain/ Mynydd Helygain

Designated Special Area of Conservation (SAC)
Country Wales
Unitary Authority East Wales
Centroid* SJ196715
Latitude 53.235
Longitude -3.204722222
SAC EU Code UK0030163
Status Designated Special Area of Conservation (SAC)
Area (ha) 604.33
* This is the approximate central point of the SAC. In the case of large, linear or composite sites, this may not represent the location where a feature occurs within the SAC.
Location of Halkyn Mountain/ Mynydd Helygain SAC

General site character

  • Inland water bodies (Standing water, Running water) (0.2%)
  • Bogs, Marshes, Water fringed vegetation, Fens (0.2%)
  • Heath, Scrub, Maquis and Garrigue, Phygrana (42%)
  • Dry grassland, Steppes (28.1%)
  • Humid grassland, Mesophile grassland (3.9%)
  • Improved grassland (21.7%)
  • Broad-leaved deciduous woodland (1.2%)
  • Inland rocks, Screes, Sands, Permanent Snow and ice (0.1%)
  • Other land (including Towns, Villages, Roads, Waste places, Mines, Industrial sites) (2.6%)

Download the Standard Data Form for this site (PDF <100kb)

Note When undertaking an appropriate assessment of impacts at a site, all features of European importance (both primary and non-primary) need to be considered.

Annex I habitats that are a primary reason for selection of this site

  • Halkyn Mountain has the most extensive recorded area of the metalliferous NVC type OV37 Festuca ovinaMinuartia verna grassland community in Wales. Stands of this vegetation type are associated with a number of old lead and zinc ore mines, which date back to Roman times and were intensively worked during the 19th century. They include relatively open, lichen-rich swards, as well as more closed examples with abundant wild thyme Thymus polytrichus. The stands are scattered over an extensive undulating plateau of Carboniferous limestone, most of which is unenclosed common land. They are associated with more extensive areas of open and closed calcareous and acidic grassland and dwarf shrub heath vegetation vegetation, some of which is upland in character.

Annex II species that are a primary reason for selection of this site

  • 1166 Great crested newt Triturus cristatus

    Halkyn Mountain is a large area of mostly common land in north-east Wales. The landscape is much modified by human activities, with abandoned metalliferous mining and rock quarries a prominent feature of the site. The large great crested newt Triturus cristatus population breeds in abandoned quarry workings and various other waterbodies across the site. The terrestrial habitat is very varied, with calcareous grassland, heathland and scrub prominent throughout. The site is grazed mostly by sheep.

Annex II species present as a qualifying feature, but not a primary reason for site selection

  • Not Applicable

Many designated sites are on private land: the listing of a site in these pages does not imply any right of public access.